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{{Speciesbox
| image = Sacred lotus Nelumbo nucifera.jpg
| image_caption = Lotus flower
| genus = Nelumbo
| species = nucifera
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}}
[[File:British 19th Century, East Indian Lotus (Nelumbo nucifera), late 19th century, NGA 52325.jpg|alt=drawing of the east Indian lotus, gouache on oriental paper|thumb|British 19th century, East Indian Lotus (''Nelumbo nucifera''), late 19th century, [[National Gallery of Art]], NGA 52325]]
'''''Nelumbo nucifera''''', also known as '''sacred lotus''', '''Indian lotus''',<ref>{{cite web |title=Sacred Lotus |url=https://www.britannica.com/plant/sacred-lotus |website=Encyclopædia Britannica |date=4 May 2023 }}</ref> or simply '''lotus''', is one of two [[extant taxon|extant]] species of aquatic plant in the [[Family (biology)|family]] [[Nelumbonaceae]]. It is sometimes colloquially called a water lily, though this more often refers to members of the family [[Nymphaeaceae]].<ref>Janice Glimn-Lacy, Peter B. Kaufman, ''Botany Illustrated: Introduction to Plants, Major Groups, Flowering Plant Families'', p. 79, 2006, Springer, [https://books.google.com/books?id=oGCsQhPbLGYC&dq=nelumbo+water+lily+-planner&pg=PT170 google books]</ref>
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It has a very wide native distribution, ranging from central and northern India (at altitudes up to {{convert|1400|m|ft|abbr=on|disp=or}} in the southern Himalayas<ref name=Mukherjee2010>{{cite journal |author1=Pulok K. Mukherjee |author2=Debajyoti Mukherjee |author3=Amal K. Maji |author4=S. Rai |author5=Michael Heinrich |year=2010 |title=The sacred lotus (Nelumbo nucifera)– phytochemical and therapeutic profile |journal=Journal of Pharmacy and Pharmacology |volume=61 |issue=4 |pages=407–422 |doi=10.1211/jpp.61.04.0001 |pmid=19298686 |s2cid=85342386 |doi-access=free }}</ref>), through northern Indochina and East Asia (north to the [[Amur region]]; the Russian populations have sometimes been referred to as "''Nelumbo komarovii''"), with isolated locations at the [[Caspian Sea]].<ref name="Zhang2015">{{cite journal |author1=Yi Zhang |author2=Xu Lu |author3=Shaoxiao Zeng |author4=Xuhui Huang |author5=Zebin Guo |author6=Yafeng Zheng |author7=Yuting Tian |author8=Baodong Zheng |year=2015 |title=Nutritional composition, physiological functions and processing of lotus (Nelumbo nucifera Gaertn.) seeds: a review |journal=Phytochem Rev |volume=14 |issue=3 |pages=321–334 |doi=10.1007/s11101-015-9401-9 |bibcode=2015PChRv..14..321Z |s2cid=16527010 }}</ref> Today, the species also occurs in southern India, Sri Lanka, virtually all of Southeast Asia, New Guinea, and northern and eastern Australia, but this is probably the result of human translocations.<ref name="Zhang2015"/> It has a very long history ({{circa}} 3,000 years) of being [[Agriculture|cultivated]] for its edible seeds<ref name="Zhang2015"/> and is commonly cultivated in [[water garden]]s.<ref name=Mukherjee2010/> It is the [[National emblem|national flower]] of India and Vietnam.
==Classification==
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[[File:Lotus flower core - carpellary receptacle 09.jpg|thumb|[[Carpel]]lary [[Receptacle (botany)|receptacle]] of lotus]]
The lotus roots are planted in pond or river bottom soil, while the leaves float on the water's surface or are held well above it. The leaf stalks (petioles) can be up to {{convert|200|cm|ftin|abbr=on}} long, allowing the plant to grow in water to that depth
=== Flower ===
The flowers are usually found on thick stems rising several centimeters above the leaves. They are showy and grow up to {{convert|
Some cultivated varieties have extraordinary numbers of petals. For example, the Chinese variety ''qian ban lian'' ("thousand petals lotus") can have between 3000 and 4000 petals in a single blossom<ref>{{cite web |url=http://www.victoria-adventure.org/more_than_links/eigi_thousand_petals.html |title=Thousand Petals |last=Nitasaka |first=Eiji |date=n.d. |access-date=September 1, 2021 }}{{Dead link|date=November 2023 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> and the Japanese variety ''ohmi myoren'' ("strange lotus") can have between 2000 and 5000 petals,<ref>{{cite web |url=https://www.flickr.com/photos/nobuflickr/893593415/ |title=Ohmi-Myoren/ Rare Lotus- Flicker |last=<not stated> |date=July 25, 2007 |access-date=September 1, 2021 }}</ref> the greatest number recorded for any species of plant.
Researchers report that the lotus has the remarkable ability to [[Thermogenic plants|regulate]] the [[temperature]] of its [[flower]]s within a narrow range, just as humans and other [[warm-blooded]] animals do.<ref>{{Cite news |author=Yoon, Carol Kaesuk |url=https://query.nytimes.com/gst/fullpage.html?res=9E04E4D7113CF932A35753C1A960958260 |title=Heat of Lotus Attracts Insects And Scientists |date=1996-10-01 |access-date=2012-11-14 |newspaper=The New York Times }}</ref> Roger S. Seymour and Paul Schultze-Motel, physiologists at the [[University of Adelaide]] in Australia, found that lotus flowers blooming in the [[Adelaide Botanic Garden]]s maintained a temperature of {{convert|30|–|35|°C|°F}}, even when the air temperature dropped to {{convert|10|°C|°F}}. They suspect the flowers may be doing this to attract [[Ectotherm|cold-blooded]] [[insect]] [[pollinator]]s. Studies published in the journals ''[[Nature (journal)|Nature]]'' and ''[[Philosophical Transactions of the Royal Society B|Philosophical Transactions: Biological Sciences]]'' in 1996 and 1998 were important contributions in the field of [[thermoregulation]] in plants. Two other species known to be able to regulate their temperature include ''[[Symplocarpus foetidus]]''<ref name="thorington">{{cite journal |last1=Thorington |first1=Katherine K. |title=Pollination and Fruiting Success in the Eastern Skunk Cabbage |journal=The Journal of Biospheric Science |volume=1 |issue=1 |date=April 1999 |url=http://www.mtholyoke.edu/courses/mmcmenam/journal.html |access-date=2022-02-02 |archive-date=2016-02-24 |archive-url=https://web.archive.org/web/20160224021947/https://www.mtholyoke.edu/courses/mmcmenam/journal.html |url-status=dead }}</ref> and ''[[
=== Seed ===
A fertilized lotus flower bears fruit that contains a cluster of 10 to 30 seeds. Each seed is ovoid 1–2.5 cm wide by 1–1.5 cm long with a brownish coat.<ref>{{cite book |last=Ong |first=H.C. |editor-last1=Flach |editor-first1=M. |editor-last2=Rumawas |editor-first2=F. |year=1996 |chapter=Nelumbo nucifera Gaertner |title=Plant Resources of South-East Asia |location=Leiden, Netherlands |publisher=Backhuys Publishers |pages=131–133 |isbn=90-73348-51-X}}</ref>{{rp|132}} Lotus seeds can remain viable after long periods of dormancy. In 1994, a seed from a sacred lotus, dated at roughly 1,300 years old ± 270 years, was successfully [[germinated]].<ref>{{cite journal |doi=10.2307/2445863 |author=Shen-Miller |year=1995 |last2=Mudgett |first2=M. B. |last3=William Schopf |first3=J. |last4=Clarke |first4=S. |last5=Berger |first5=R. |title=Exceptional seed longevity and robust growth: Ancient sacred lotus from China |journal=[[American Journal of Botany]] |issue=11 |volume=82 |pages=1367–1380 |jstor=2445863 |display-authors=etal}}</ref><ref>{{cite journal |author=
The traditional sacred lotus is only distantly related to ''[[Nymphaea caerulea]]'', but possesses similar chemistry. Both ''Nymphaea caerulea'' and ''Nelumbo nucifera'' contain the alkaloids [[nuciferine]] and [[aporphine]].{{Citation needed|date=January 2021}}
The [[genome]] of the sacred lotus was sequenced in May 2013.<ref>{{cite journal |last1=Ming |first1=Ray |last2=VanBuren |first2=Robert |last3=Liu |first3=Yanling |last4=Yang |first4=Mei |last5=Han |first5=Yuepeng |display-authors=etal |year=2013 |title=Genome of the long-living sacred lotus (''Nelumbo nucifera'' Gaertn.) |journal=Genome Biology |volume=14 |issue=5 |page=R41 |doi=10.1186/gb-2013-14-5-r41 |pmid=23663246 |pmc=4053705 |doi-access=free }}</ref><ref>{{cite news |title=Sacred Lotus Genome Sequence Enlightens Scientists |url=https://www.sciencedaily.com/releases/2013/05/130510180252.htm |newspaper=Science Daily |date=10 May 2013 |access-date=13 May 2013}}</ref><ref>{{cite news |title=Scientists sequence genome of 'sacred lotus,' which likely holds anti-aging secrets |author=Wolpert, Stuart |url=http://newsroom.ucla.edu/portal/ucla/scientists-sequence-genome-of-245577.aspx |newspaper=UCLA Newsroom |date=10 May 2013 |access-date=13 May 2013}}</ref> A dedicated genome database lists additional genome assemblies sequenced since then.
== Cultivation ==
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=== Harvest ===
[[File:LotusBud0048a.jpg|200px|thumb|Lotus bud]]
[[File: A budding lotus flower.jpg|200px|thumb|
The [[stolon]] is ready to harvest two to three months after planting. It must be harvested before flowering. Harvesting the stolon is done by manual labor. For this step, the field is not drained. The stolon is pulled out of the water by pulling and shaking the young leaves in the shallow water.<ref name=":10" />
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The flowers are capable of producing ink used by artists such as [[Morrison Polkinghorne]] to produce abstract images of the landscapes of southern Asia.<ref>{{cite web |title=Aussie artist turning pagoda flowers into art |url=https://www.phnompenhpost.com/lifestyle-arts-culture/aussie-artist-turning-pagoda-flowers-art |author=Pann Rethea |date=22 March 2020 |publisher=Phenon Penh Post}}</ref>
One example of a flower lotus is
The sacred lotus may be crossed with the [[yellow lotus]] to produce [[interspecific hybrid]]s. A few varieties have been produced with differing appearances.<ref>{{Cite journal |doi
=== Farming ===
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==== Rhizomes ====
[[File:Lotus root.jpg|thumb|Lotus [[
[[File:JaRenkonLotus11R.jpg|thumb|Boiled, sliced lotus roots used in various Asian cuisines]]
The [[rhizome]]s of lotus ({{Lang-zh|t=|c=蓮藕|p=lián-ǒu}}, {{Lang-ja|蓮根|translit=renkon}}, {{Lang-ko|연군or蓮根|translit=yeongun}}, {{Lang-hi|कमल ककड़ी|translit=
Lotus root is a popular vegetable in Sri Lanka, where it is often cooked in coconut milk gravy. In India, lotus root (also known as ''
Japan is one of the primary users of the rhizomes, representing about 1% of all vegetables consumed. Japan grows its own lotus but still must import 18,000 tons of lotus rhizome each year, of which China provides 15,000 tons yearly.<ref>{{cite journal |last1=Tsuchiya |first1=T. |last2=Nohara |first2=S. |year=1989 |title=Growth and life span of the leaves of Nelumbo nucifera Gaertn. in lake Kasumigaura, Japan |journal=Aquatic Botany |volume=36 |issue=1 |pages=87–95 |doi=10.1016/0304-3770(89)90094-6 |bibcode=1989AqBot..36...87T }}</ref>
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Dry stored lotus seeds are sensitive to moisture and [[Mold (fungus)|mold infestation]]; researchers continue to explore new ways to preserve fresh lotus seeds, such as [[food irradiation|radiation processing]].<ref>{{cite journal |last1=Bhat |first1=R |last2=Sridhar |first2=KR |last3=Karim |first3=AA |last4=Young |first4=CC |last5=Arun |first5=AB |year=2009 |title=Influence of c-radiation on the nutritional and functional qualities of lotus seed flour |journal=J Agric Food Chem |volume=57 |issue=20 |pages=9524–9531 |doi=10.1021/jf902287e |pmid=19778060 }}</ref>
Lotus seeds can be processed into [[Mooncake|moon cake]], lotus seed noodles and food in the forms of [[Lotus seed paste|paste]], fermented milk, rice wine, ice cream, popcorn (''phool makhana''), and others, with lotus seeds as the main raw material. Traditional
==== Stems ====
Young lotus [[Plant stem|stems]] are used as a salad ingredient in [[Vietnamese cuisine]] and as a vegetable ingredient for some soup and curry in Thailand, such as ''keang som sai bua'' ({{lang-th|แกงส้มสายบัว}}, lotus stem sour soup) and ''keang kati sai bua'' ({{lang|th|แกงกะทิสายบัว}}, lotus stem in coconut milk curry).
In[[North India|northern]] and [[East India|eastern]] regions of India, the stalk of the flower is used to prepare a soup, ''
In the [[Philippines]], an indigenous variety called ''tukal'' is used as the main ingredient in dishes with coconut milk. The stems and petals can be bought in markets when in season.
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==== Leaves ====
[[File:Cỗ_trung_thu.JPG|thumb|right|Vietnamese-style green young rice ([[cốm]]) wrapped in lotus leaves, traditionally consumed with ripe bananas and tea during autumn at the beginning of the rice harvest]]
In China and Korea, [[Lotus tea#lotus leaf tea|lotus leaf tea]] ({{Lang-ko|연잎차|translit=yeon'ip-cha}}) is made from the leaves of the lotus. It is also used as a wrap for steaming [[rice]] and [[sticky rice]] and other steamed dishes in Southeast Asian cuisine, such as ''[[lo mai gai]]'' in Chinese cuisine or ''[[kao hor bai bua]]'' (
Vietnamese also use lotus leaves to wrap green young rice, ''[[cốm]]'', which is eaten in [[autumn]]. The leaves impart a unique scent to the soft, moist rice.
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[[File:Yeonkkot-cha.jpg|thumb|[[Lotus flower tea]]]]
In Korea, [[lotus flower tea]] ({{Lang-ko|연꽃차
The [[stamen]]s can be dried and made into a fragrant [[herbal tea]] ({{zh|t=[[wikt:蓮花|蓮花]]
==== Risks ====
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=== Use in water treatment ===
''Nelumbo nucifera'' shows high potential for usage in wastewater treatment removing polluting compounds<ref name=":0">{{Cite journal |author1=Thongchai Kanabkaew |author2=Udomphon Puetpaiboon |date=2004 |title=Aquatic plants for domestic wastewater Treatment: Lotus (Nelumbo nucifera) and Hydrilla (Hydrilla verticillata) systems |url=http://www.thaiscience.info/journals/Article/SONG/10462464.pdf |journal=Songklanakarin J. Sci. Technol |volume=26 }}</ref> and heavy metals.<ref name=":1">{{Cite journal |author1=H.M. Anawar |author2=A. Garcia-Sanchez |author3=M. Tari Kul Alam |author4=M. Majibur Rahman |date=2008 |title=Phytofiltration of water polluted with arsenic and heavy metals |url=http://www.inderscienceonline.com/doi/abs/10.1504/IJEP.2008.0194 |journal=International Journal of Environment and Pollution |volume=33 |doi=10.1504/IJEP.2008.0194 |doi-broken-date=
=== Storage and commercialization ===
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}}
All parts of ''Nelumbo nucifera'' are edible, with the rhizome and seeds being the main consumption parts. Traditionally rhizomes, leaves, and seeds have been used as [[Traditional medicine|folk medicines]], [[Ayurveda]], [[Traditional Chinese medicine|Chinese traditional medicine]], and [[oriental medicine]].<ref name=":13">Khare CP. ''Indian Herbal Remedies: Rational Western Therapy, Ayurvedic, and Other Traditional Usage, Botany'', 1st edn. USA: Springer, 2004: 326–327.</ref><ref name=":14">Sridhar KR, Bhat R. Lotus: a potential nutraceutical source. ''J Agri Technol'' 2007; '''3''': 143–155.</ref> In Chinese medicine, seeds are still used as {{transliteration|zh|lian zi xin}} ({{lang|zh|蓮子心}}).<ref>{{Cite journal |doi
Lotus rhizomes and seeds and their processing by-products are widely consumed in Asia, the Americas, and Oceania for high content of physiologically [[active substance]]s.<ref name=":15">{{cite journal |
These days the perennial aquatic herb is gaining popularity because of its nutraceutical and historical importance<ref name=":15" /><ref name=":16">{{cite journal | doi = 10.1007/s11101-015-9401-9 | title = Nutritional composition, physiological functions and processing of lotus (Nelumbo nucifera Gaertn.) seeds: A review | journal = Phytochemistry Reviews | volume = 14 | issue = 3 | page = 321 | year = 2015 | last1 = Zhang | first1 = Yi | last2 = Lu | first2 = Xu | last3 = Zeng | first3 = Shaoxiao | last4 = Huang | first4 = Xuhui | last5 = Guo | first5 = Zebin | last6 = Zheng | first6 = Yafeng | last7 = Tian | first7 = Yuting | last8 = Zheng | first8 = Baodong | bibcode = 2015PChRv..14..321Z | s2cid = 16527010}}</ref> It will be of economic value if the different parts of lotus can be developed as [[functional food]].<ref name=":14" /><ref name=":16" /> Because of its special role in human health and richness in nutrients and bioactive substances, the Chinese Ministry of Health approved the use of ''N. nucifera'' as both "food and [[Medicinal plants|medicine]]."<ref>{{Cite journal |doi = 10.1016/j.foodchem.2007.04.011 |title = Evaluation of the quality of lotus seed of Nelumbo nucifera Gaertn from outer space mutation |year = 2007 |last1 = Wu |first1 = J. |last2 = Zheng |first2 = Y. |last3 = Chen |first3 = T. |last4 = Yi |first4 = J. |last5 = Qin |first5 = L. |last6 = Rahman |first6 = K. |last7 = Lin |first7 = W. |journal = Food Chemistry |volume = 105 |issue = 2 |pages = 540–547}}</ref>
==== Rhizomes ====
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Lotus seeds also contain particularly large amounts of vitamins, including [[Vitamin B1|VB1]], [[Riboflavin|VB2]], [[Vitamin B6|VB6]] and [[Vitamin E]].<ref>Zheng B, Zheng J, Zeng S (2003) Analysis of the nutritional composition in Chinese main lotus seed varieties. Acta Nutr Sin 25:153–156</ref><ref>Wu J, Zheng Y, Chen T, Yi J, Qin L, Rahman K, Lin W (2007) Evaluation of the quality of lotus seed of Nelumbo nucifera Gaertn. from outer space mutation. Food Chem 105:540–547</ref>
The functional components (polyphenols, protein, polysaccharides) in ''N. nucifera'' seeds can help combat high [[Hypertension|blood pressure]], [[Diabetes mellitus|diabetes]], and [[gallstone]]s.
After lotus [[Germination|seed germination]], crude protein and fat levels in the endosperm significantly increase. It is therefore an important method to enhance its nutritional quality.<ref>Xia Y (2012) Effect of germination on chemical and functional properties of lotus seeds. Food Sci 33:91–98</ref><ref name=":16" />
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''Nelumbo nucifera'' is a lotus species with historical cultural and spiritual significance. It is a sacred flower in both Hinduism and Buddhism,<ref>{{cite web |title=Nelumbo nucifera (sacred lotus) |url=http://www.kew.org/science-conservation/plants-fungi/nelumbo-nucifera-sacred-lotus |publisher=Kew |access-date=26 July 2015 |archive-url=https://web.archive.org/web/20140530010810/https://www.kew.org/science-conservation/plants-fungi/nelumbo-nucifera-sacred-lotus |archive-date=30 May 2014 }}</ref> representing the path to spiritual awakening and enlightenment. In Christianity, the lotus flower is often associated with the apostle [[Thomas the Apostle|Thomas]] and his coming to India.<ref>[https://books.google.com/books?id=lZUBZlth2qgC&q=Muziris ''The Encyclopedia of Christianity, Volume 5''] by Erwin Fahlbusch. Wm. B. Eerdmans Publishing – 2008. p. 285. {{ISBN|978-0-8028-2417-2}}.</ref> The lotus flower is also mentioned in the bible.<ref>{{Cite web |title=Bible Gateway passage: Job 40:21–22 – New International Version |url=https://www.biblegateway.com/passage/?search=Job%2040%3A21-22&version=NIV |access-date=2023-09-06 |website=Bible Gateway |language=en}}</ref>
In Asian art, a [[lotus throne]] is a stylized lotus flower used as the seat or base for a figure. It is the normal pedestal for divine figures in [[Buddhist art]] and [[Hindu art]] and is often seen in [[Jain art]]. Originating in [[Indian art]], it followed [[Indian religions]] to [[East Asia]] in particular. Lotus flowers are also often held by figures.<ref>Jansen, Eva Rudy, ''The Book of Hindu Imagery: The Gods and their Symbols'', p. 18, 1993, Binkey Kok Publications, {{ISBN|9074597076}}, 9789074597074, [https://books.google.com/books?id=1iASyoae8cMC&pg=PA18 google books]</ref><ref>Krishan, Yuvrajmm, Tadikonda, Kalpana K., ''The Buddha Image: Its Origin and Development'', pp. 65, 78, 1996, Bharatiya Vidya Bhavan, {{ISBN|8121505658}}, 9788121505659, [https://books.google.com/books?id=kDyJh--iaL0C&pg=PA65 google books]</ref><ref>Moore, Albert C., Klein, Charlotte, ''Iconography of Religions: An Introduction'', p. 148, 1977, Chris Robertson, {{ISBN|0800604881}}, 9780800604882, [https://books.google.com/books?id=chWcZcYcyeQC&pg=PA149 google books]</ref><ref>Rodrigues, H, [http://www.mahavidya.ca/2016/04/22/the-sacred-lotus-symbol/ "The Sacred Lotus Symbol"], ''Mahavidya'', 2016</ref><ref>{{cite book |last=Shakti |first=M. Gupta |title=Plant Myths and Traditions in India |year=1971 |publisher=[[Brill Publishers]] |location=[[Netherlands]] |pages=65–67 |url=https://books.google.com/books?id=stIUAAAAIAAJ&pg=PA65}}</ref>
The ''Nelumbo nucifera'', which is also called ([[Niloufar|Nilufar]] Abi in Persian), can be seen in many reliefs of the Achaemenid period (552 BC) such as the statue of [[Anahita]] in the [[Persepolis]]. The lotus flower was included in [[Kaveh the blacksmith]]'s [[Derafsh]] and later as the flag of the Sasanian Empire [[Derafsh Kaviani]]. Today, it is the symbol of Iranians [[Solar Hijri calendar]].
The lotus flower also holds cultural and religious significance in [[Isma'ilism|Ismaili]] Muslim and related South Asian traditions. For example, in South Asian Ismaili literature, the lotus is compared to the pure soul. A poem describes the lotus' beauty, describing how its delicate white petals remain pure and beautiful, despite its murky environment. Similarly, a pure soul is part of this world, yet is not of this world, much like the circumstances of the lotus. The poem further emphasizes the importance of true knowledge or gnosis, which is likened to the pure rainwater that allows the lotus to flourish. Ismaili belief holds that the true guide provides this true knowledge, without which the pure soul cannot survive. Just as the lotus flower would rather die than drink from a reeking swamp, the pure soul also seeks nourishment solely through true knowledge.<ref>{{Cite journal |last=Virani |first=Shafique |date=2005-01-01 |title=Symphony of Gnosis: A Self-Definition of the Ismaili Ginan Literature |url=https://www.academia.edu/36984287 |journal=Reason and Inspiration in Islam: Theology, Philosophy and Mysticism in Muslim Thought |page=507}}</ref>
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