Never feel remorse for what you have thought about your wife she has thought much worse things about you.

In politics, yesterday's lie is attacked only to flatter today's.

A few great minds are enough to endow humanity with monstrous power, but a few great hearts are not enough to make us worthy of using it.

Renown? I've already got more of it than those I respect, and will never have as much as those for whom I feel contempt.

Science has made us gods even before we are worthy of being men.