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The Sixteen Great Bodhisattva Precepts can be divided into three groups or sections: the Three Refuges, the Three Pure Precepts, and the Ten Grave Precepts. The Three Refuges express our vow to take refuge in the Triple Treasure: buddha, dharma, and sangha. The Three Pure Precepts are vows to embrace and sustain forms and ceremonies, to embrace and sustain all good actions, and to embrace and sustain all beings. The Ten Grave Precepts teach us to abstain from killing, stealing, misusing sexuality, lying, intoxicating mind or body of self or other, speaking of others’ faults in a disparaging way, praising self at the expense of others, being possessive of anything, harboring ill will, and disparaging the Triple Treasure. Put in a more positive way, the Ten Grave Precepts encourage us to protect and nurture life, to be generous and respectful of others’ property, to use sexual energy in an appropriate way, to tell the truth, to maintain a clear mind and body, to speak of the virtues of others and our interdependence with them, to be generous in all material and spiritual matters, to practice loving kindness and nonviolence, and to respect and protect the Triple Treasure.
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Reb Anderson (Being Upright: Zen Meditation and Bodhisattva Precepts (Zen Meditation and the Bodhisattva Precepts))