"Klesha, Sanskrit, meaning “trouble” or “affliction.” “These factors, which can be compared to the drives of an earlier generation of psychologists, provide the cognitive and motivational framework for the ordinary individual enmeshed in conditional existence (samsâra) and ignorant of the transcendental Self.” According to Patañjali, kriya-yoga aims at the attenuation of the kleshas."

- ~Psychology of Yoga and Meditation, Page 11-12, fn 117