Within the Yoga Sūtras of Patañjali, the ethical foundation of practice is articulated through the five Yamas and five Niyamas, which together shape a life of disciplined clarity and inner refinement. The Yamas are restraints, guiding one away from actions that disturb harmony. Ahimsa is non-violence or non-harming, extending to thought, word, and deed. Satya is truthfulness, an alignment of speech and intention with what is real. Asteya, non-stealing, is the refusal to take what is not freely given. Brahmacharya is continence or moderation in relation to sensual energy, often understood as chastity or celibacy. Aparigraha, non-possessiveness, is freedom from grasping, greed, and clinging to possessions.

The Niyamas, by contrast, are observances that cultivate an inner disposition conducive to spiritual growth. Saucha is purity or cleanliness, both of body and mind, creating a clear vessel for deeper practice. Santosha is contentment, a quiet satisfaction with what is present rather than restless seeking. Tapas is disciplined effort or austerity, the steady, sometimes challenging heat of practice that purifies and strengthens. Svadhyaya is self-study, which includes introspection and the study of sacred texts, turning attention toward understanding the nature of the self. Ishvara-pranidhana is surrender or devotion to a higher power, offering actions and their fruits to the Divine and thus loosening the grip of ego.

Taken together, these ten principles outline an ethical and contemplative framework that supports the entire path of yoga. The Yamas orient conduct in relation to others and the world, ensuring that outer life does not contradict inner aspiration. The Niyamas shape the inner landscape, nurturing attitudes and disciplines that allow insight to deepen. When lived sincerely, they do not merely impose rules but gradually reveal a way of being in which clarity, compassion, and steadiness arise naturally.