Shurangama Sutra

The Śūraṃgama-sūtra [also Shurangama Sutra or Surangama Sutra] (c. 700) is a Mahayana sutra and one of the main texts used in the Chan school of Buddhism.

Quotes

 * Things are not what they seem; nor are they otherwise.
 * As quoted in 1,001 Pearls of Wisdom (2006) by David Ross