When a man has done so much good work and thought so many good thoughts that there is an irresistible tendency in him to do good in spite of himself and even if he wishes to do evil, his mind, as the sum total of his tendencies, will not allow him to do so; the tendencies will turn him back; he is completely under the influence of the good tendencies. When such is the case, a man’s good character is said to be established
Class on Karma Yoga, New York : Complete Works 1.54-55 Secret of work