Anushasana Parva 6.46

The inan who does not cxert himself is never contented in this world, nor can Destiny change the course of a man who has gone wrong. There is no power inherent in Destiny. As the pupil follows the preceptor, so does one's action, guided by Destiny, follows his own personal exertion. Where one's own exertion is displayed, there only Destiny, shows its hand.