So here's what it says:
When you get what you want in your struggle for self, and the world makes you king for the day, just go to the mirror and look at yourself and see what the man has to say. For it isn't your father or mother or wife who's judgement upon you must pass. The fellow who's verdict counts most in your life is the one staring back from the glass. You may be like Jack Horner and chisel a plum and think you're a wonderful guy, but the man in the glass says your only a bum if you can't look him straight in the eye.