I like the quotes below as well, from Voltaire:
Anything too stupid to be said is sung.
Doubt is not a pleasant condition, but certainty is absurd.
I have never made but one prayer to God, a very short one: 'O Lord, make my enemies ridiculous.' And God granted it.
Indeed, history is nothing more than a tableau of crimes and misfortunes.
It is dangerous to be right when the government is wrong.
It is forbidden to kill; therefore all murderers are punished unless they kill in large numbers and to the sound of trumpets.