What are some of your favorite quotes?

Are there any quotes that you identify with on a deeper level of some kind?

Just post one or two, or more if you have time so we can get to know each other better.

Here’s two of mine:
“Flatter me, and I may not believe you. Criticize me, and I may not like you. Ignore me, and I may not forgive you. Encourage me, and I will not forget you. Love me, and I may be forced to love you.”
– William Arthur Ward

“The very powerful and, the very stupid, have one thing in common. Instead of altering their views to fit the facts, they alter the facts to fit their views…which, can be very uncomfortable if you happen to be one of the facts that needs altering.”
– Doctor Who