It takes place, by and large, with the same sort of necessity as a tree brings forth fruit, and demands of the world no more than a soil on which the individual can flourish.
What do you want to do sadhana for? The aim should not be the satisfaction of egoism: "I want to be a great yogi; I shall have so much power and with that power I shall establish myself in the world." All such thoughts must be thrown far away.
There are moments when one has to choose between living one's own life, fully, entirely, completely-or dragging out some false, shallow, degrading existence that the world in its hypocrisy demands.