What you need for spiritual progress are three things : A heart free from attachment and hatred, a tongue that is not tainted by untruth, a body not polluted by violence. The one who has these three is of sacred birth. Without these three, all penances and religious practices are of no use. You have to pray incessantly for Divine grace to confer these qualities. Realize that the Divine is within you.
(SS, March 1997 - Pg 68)