Sūta said: Obstacles to yogic practice take shape in ten different ways. They are (1) lethargy, (2) ailment, (3) negligence, (4) doubt, (5) unsteady mind, (6) lack of faith, (7) illusion, (8) misery, (9) dejection and (10) indulgence in sensual pleasures. Of these lethargy means abstention from work due to the bulkiness of the body and mind.