It's the same thing that drives people to want to experience sexual pleasure or have one too many drinks. We all want to experience the other, and to get out of our daily existence.
You have to decide what is extraneous and what is central. There is always more to tell. If you want to have a finished product, at some point you have to say "enough."
If we are honest and fair, then we are known by that. If we are not, alas, we are known by that as well. What we want to do is do right, but you have to say it, you have to show it, and not stop.
I have enough of life in me to make somebody jealous enough to want to knock me down. I have so much courage in me that I have the effrontery, the incredible gall to stand up. That's it. That's how you get to know who you are.
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.