Within Seon, ethical life is rooted in the classical Buddhist precepts, yet understood as a living expression of an awakened mind rather than as mere external regulation. At the foundation stand the Five Precepts (오계, ogyae) for lay practitioners: refraining from killing or harming living beings, from stealing or taking what is not given, from sexual misconduct, from false or deceptive speech, and from intoxicants that cloud the mind. These are not simply prohibitions; they are ways of cultivating compassion, honesty, responsibility, clarity, and respect for all forms of life. In this sense, ethical discipline and meditative practice are not two separate tracks but mutually reinforcing dimensions of the same path.

For monastics, these basic commitments are deepened through additional precepts that further simplify and purify daily life. The extended set includes observances such as not eating after noon, avoiding entertainment and bodily adornment, not sleeping on luxurious beds, and maintaining strict celibacy, all of which support a life of renunciation and focused practice. These disciplines are complemented by the broader Vinaya and Mahāyāna bodhisattva ethos, in which the practitioner vows to save all beings, eliminate afflictions, learn the Dharma, and realize perfect enlightenment. Here, ethics is framed as a vast altruistic project: the entire life of the practitioner becomes oriented toward the welfare and liberation of others.

Seon thought places particular emphasis on how these precepts are held and lived. Ethical guidelines are seen as skillful means for creating conditions conducive to meditation and awakening, not as rigid dogma. When understood in the light of meditative insight, they become an expression of non-attachment, truthful living, and compassionate action in every aspect of daily life. As insight matures, right conduct, careful speech, and mindful restraint arise more and more naturally, as if “the precepts keep themselves.” In this way, Seon ethics is not merely about conforming to rules, but about allowing wisdom and compassion to permeate behavior so thoroughly that ethical conduct becomes the spontaneous activity of an awakened mind.