An excerpt from The Mind: Its Projections and Multiple Facets by Yogi Bhajan (page 59)
You should always remain you. You are supposed to remain you, come what may. That is the actual strength of your mind when it is clean and clear. But you do not handle the mind right. You distort the ego first thing. Instead of handling the ego, its attachments and duties simply as they are, you over stretch the ego. You inflate it and deflate it until the window of the mind is like those funhouse mirrors. You over stretch your ego, you attack it as it is, and then you cannot handle the inflation and stretch.
Now you are caught in the game of mind and ego. Between the two, you can be stretched until nothing is left. If you can remember this one little thing and take it to heart, then you can solve your problems one hundred percent. Just remember: the mind is given to you, you are not given to the mind.