http://www.elephantjournal.com/2011/07/the-buddhas-meditation--dr-evan-finkelstein/Pätkä shuuran.gama-suutrasta:
Ananda, and everyone in the great assembly,
Turn around your mechanism for hearing.
Return the hearing to hear your own nature
The nature will become the supreme Way.
That is what perfect penetration really means.
That is the gateway entered by Buddhas as many as dust motes.
That is the one path leading to Nirvana.
Tathagatas of the past perfected this method.
Bodhisattvas now merge with this total brightness.
People of the future who study and practice
Will also rely on this Dharma. ~ Shurangama Sutra
