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.
In the scientific world I find just that disinterested devotion to great ends that I hope will spread at last through the entire range of human activity.
And people get all fouled up because they want the world to have meaning as if it were words... As if you had a meaning, as if you were a mere word, as if you were something that could be looked up in a dictionary. You are meaning.