Purity of Heart Whenever the wavering and unsteadfast heart wanders away, then so often let him subdue it and bring it back to the control of the soul; For supreme happiness comes to the Yogin whose heart is at rest, in whom passion is tranquilised, who is one with Brahma, and free from sin. The Yogin thus uniting his soul (to Brahman), who has ceased from sin, enjoys easily the boundless happiness of union with Brahman. Bhagavad Gita 6:26-29