Do you ever suddenly realize that you don't know yourself half so well as you thought? The story of your life is playing out, and something happens, that makes you stop and look at yourself a little more closely. "Oh," you say in surprise, "I didn't know you were like that. Is there anything else I should know before we continue?" And it might not be necessarily bad or unpleasant, just enlightening. A reaction you have, or a conviction you discover you strongly hold to, the fact that you can suddenly raise one eyebrow - anything, really. I think it's fascinating that we still have so much yet to learn about everything, even ourselves.