Klesha (, ) is a Sanskrit word meaning "impurity", "corruption" or "poison". In Hinduism, a klesha is a mental state, such as fear or ignorance, that clouds the mind and leads to unhealthy actions. It is an obstacle to reaching a state of enlightenment and liberation (moksha) from saá¹ÂsÃÂra.
The third of the second chapter of Patañjali's Yoga Sà «tras explicitly identifies the five poisons ():
Translated into English, these five kleshas are:
According to the Yoga Sutras, there are four stages for overcoming the effects of the kleshas: the active stage (udaram), the detached stage (vicchinna), the decaying stage (tanu) and the dormant stage (parsupta).
The Yoga Sutras of Patanjali describe suffering as an impediment to spiritual growth. Yogic practices such as meditation and pranayama breathing exercises provide methods to overcome afflictions. According to Shiva Purana 2.3.5 and Hathatatvakaumudi, klesha refers to suffering (i.e. suffering caused by penance).