Shiva is depicted as both an ascetic yogi and as a householder (grihasta), roles which have been traditionally mutually exclusive in Hindu society. When depicted as a yogi, he may be shown sitting and meditating. His epithet Mahāyogi ("the great Yogi: 'Mahā' = "great", "Yogi" = "one who practices Yoga") refers to his association with yoga. While Vedic religion was conceived mainly in terms of sacrifice, it was during the Epic period that the concepts of tapas, yoga, and asceticism became more important, and the depiction of Shiva as an ascetic sitting in philosophical isolation reflects these later concepts.