How to Practice Samadhi

"How does one practice Samadhi? If one, when practicing samadhi, does it to enlighten himself, for profit, not for the sake of all beings, not for the practice of Dharma, but by greed, by defiled food, for sexual reasons, due to impurities of the nine holes, for disputes, for beating and killing others; any person who practices Samadhi thus, is not someone who practices Samadhi.

Oh, good man! What is the true practice of Samadhi? Someone who practices for the sake of all beings, to deploy in the minds of beings the all-equal idea, the non-retroactive Dharma, the holy mind, to enable beings to attain the Mahayana, to guard the Unsurpassed Dharma, for beings do not retrogress from Enlightenment, for them to gain the Surangama (Samadhi), the Vajra Samadhi, Dharanis [i.e., long mantras or magic spells], to enable beings to obtain the four unhinderednesses (wisdom), to enable beings to see the Buddha Nature. And when practicing thus, one sees no Samadhi, nor form of Samadhi, nor a person who practices this, nor any results to be achieved. Oh, good man! If things indeed proceed thus, we say that this person is practicing Samadhi."

Nirvana Sutra, Chapter 35, on Bodhisattva Lion's Roar 3.

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