It's not the situation, but whether we react, or respond, to the situation that's important.
You might not be what you say you are, but what you say, you are.
You will never find a truly happy self-centered person. They simply don't exist.
By the mile it's a trial, but by the inch it's a cinch.
You can disagree without being disagreeable.
For every sale you miss because you're too enthusiastic, you will miss a hundred because you're not enthusiastic enough.