Many pious legends abound about this androgynous figure, so much known about Him/Her yet so little of that are 'Buddhist' in perspective. Here's some Tripitaka canonical references on Him, known to Mahayanist/Vajrayanist Buddhists also as "Samyak Vidya Dharma Tathagata" (Right(True/Proper) Brightness/Knowledge of Dharma Thus Come One) who has now manifested as the 'Observer of the World's Sounds Bodhisattva' (Avalokitesvara Bodhisattva) in all of the six realms of Existence as a bridge and for their benefit towards the Buddha Dharma.
From the Lotus Sutra:
His Causes and Conditionshttp://www.e-sangha.com/alphone/dabei_sutra.htm
The Six Syllable Great Bright Mantra (Om Mani Padme Hum)http://www2.fodian.net/old/English/1050.html
His causes, conditions and as future Sukhavati's Teaching Host:http://www.sutrasmantras.info/sutra07.html
His Method in the Shurangama Sutra:http://www.e-sangha.com/alphone/shurang ... okitesvara
Visualizing Him:http://www.cloudwater.org/visualization ... okitesvara
Maha Cundi: (one of His many Esoteric teaching forms)http://www.e-sangha.com/alphone/cundi.html
The Heart Sutra
Full Text: http://www.shambhala.org/teachers/pema/shtk.php
Shorter Text: http://www.drba.org/dharma/heartsutra.asp
(Would appreciate if anyone can add here from the Avatamsaka Sutra on His Causes and Conditions, haven't had time yet to read that great volumnious Sutra)
His Name Chants:(in Mandarin)http://www.immmusic.com/product/eng/1008.htm
(First preview: Namo Guan Shi Yin Pu Sa / Second Preview: Namo Da Bei Guan Shi Yin Pu Sa)http://www.youtube.com/watch?v=DLF-pqLYlcIhttp://www.youtube.com/watch?v=vIa-CVT1 ... re=relatedhttp://www.youtube.com/watch?v=_ALeZIxE ... re=relatedhttp://www.youtube.com/watch?v=_ALeZIxE ... re=relatedhttp://www.amitabha-gallery.org/chants2.htmhttp://www.cttbusa.org/recitation/gwanyinchant.mp3
(just the front cover)http://www.adidaphat.us/phapamhtm/tranghinh.htm
His Dharma Repentance: (a Chinese Mahayana Liturgy)http://www.siddham.org/yuan_english/sut ... ssion.html
(format by Dharma Realm Buddhist Association)
(see link here
for Word attachment of the similar Repentance by Fo Guang Shan)
Will be back for more
Om Mani Padme Hum!
Namo Amitabha Buddha!