"The Universal Door Of The Bodhisattva Who Listens To The Sounds Of All The World"

The Universal Door Chapter (Pu Men Pin 普門品）is a very popular sutra explaining why Guanyin is known as
Guanyin (The Bodhisattva Who Listens To The Sounds Of All The World).

Glad to read the blog by Rev. Heng Sure where the English version was introduced:

http://paramita.typepad.com/dharma_forest/2009/04/recite-the-universal-door-chapter-of-the-lotus-sutra.html

Happy Reading!!!!