Any quotes by people you admire or people that others think are admirable. My sig is a great example, but I've got a few others:
"Freedom in capitalist society always remains about the same as it was in ancient Greek republics: Freedom for slave owners. "
"It is true that liberty is precious; so precious that it must be carefully rationed."
"All our lives we fought against exalting the individual, against the elevation of the single person, and long ago we were over and done with the business of a hero, and here it comes up again: the glorification of one personality. This is not good at all. I am just like everybody else."