Know thyself

To get to know yourself, you need to observe yourself. You need to observe yourself in action, closely. What you're telling yourself, your explanations, rationalizations and ideas about yourself are quite uninteresting. It's when you do something that you have a chance to catch a glimpse of yourself, when you refuse to call her back, when you suddenly decide to go to the pub, when you stuff yourself with pancakes, etc.

To get to know to yourself can be very unpleasant. It can be like trying to make friends with a pisshead on a park bench or a priggish little jerk in a lunch room. 

You think that you're sensible, but you're not. The sensible part of you is just a part of you. You are not just one person. You consist of several personalities, much like a small family business that is run by a family. Sometimes is your father at the helm, sometimes your mother, sometimes your uncle.