Shaucha (Sanskrit: शौच, also spelled Saucha, Śauca) literally means purity, cleanliness and clearness. It refers to purity of mind, speech and body. Saucha is one of the Niyamas of Yoga. It is discussed in many ancient Indian texts such as the Mahabharata and Patanjali's Yoga Sutras. It is a virtue in Hinduism and Jainism.
Saucha includes outer purity of body as well as inner purity of mind. The concept of Saucha is synonymous with Shuddhi (शुद्धि). LePage states that Saucha in yoga is on many levels, and deepens as an understanding and evolution of self increases.
Shaucha, or holistic purity of the body, is considered essential for health, happiness and general well-being. External purity is achieved through daily ablutions, while internal purity is cultivated through physical exercises, including asana (postures) and pranayama (breathing techniques). Along with daily ablutions to cleanse one's body, the concept of Shaucha suggests clean surrounding, along with fresh and clean food to purify the body. Lack of Saucha, such as letting toxins build in body are a source of impurity.
Shaucha goes beyond purity of body, and includes purity of speech and mind. Anger, hate, prejudice, greed, pride, fear, negative thoughts are a source of impurity of mind. The impurities of the intellect are cleansed through the process of self-examination, or knowledge of self (Adhyatma-Vidya). The mind is purified through mindfulness and meditation on one's intent, feelings, actions and its causes.
Saucha is included as one of five Niyamas in Yoga, that is activity that is recommended for spiritual development of an individual. Verse II.32 of Yogasutra lists the five niyamas. In verse II.40, Patanjali describes outer purity, while verse II.41 discusses inner purity, as follows:
सत्त्वशुद्धिसौमनस्यैकाग्र्येन्द्रियजयात्मदर्शन योग्यत्वानि च
Through cleanliness and purity of body and mind (Saucha, Shudhi)
comes a purification of the essence (sattva),
a goodness and gladness of feeling,
a sense of focus with intentness, the mastery and union of the senses,
and a fitness, preparation and capability for self-realization.
Saucha is one of the ten Yamas listed by Śāṇḍilya Upanishad, as well as by Svātmārāma. It is one of the virtuous restraints (yamas) taught in ancient Indian texts. The other nine yamas are Ahiṃsā (अहिंसा): Nonviolence, Satya (सत्य): truthfulness, Asteya (अस्तेय): not stealing, Brahmacharya (ब्रह्मचर्य): celibacy chastity and fidelity,Kṣamā (क्षमा): forgiveness,Dhṛti (धृति): fortitude, Dayā (दया): compassion,Ārjava (आर्जव): sincerity and non-hypocrisy, and Mitahara (मितहार): moderate diet.