What is called renunciation you should know to be the same as yoga, or linking oneself with the Supreme, O son of Pandu, for one can never become a yogi unless he renounces the desire for sense gratification.

Renunciation and yoga are the same thing seen from two angles. No one becomes a true yogi without first renouncing the resolve born of selfish desire. The inner giving-up of craving is what yoga fundamentally is.