The thing about villains is that villains always have their own logic, and they don't necessarily see themselves as villains. Richelieu is not a villain, in his own mind. He's doing what he needs to do.

Logic won't change an emotion but action will.

The mighty power of logic cleanses all it touches.

Be reasonable with the students and make sure they see the logic in what we're doing.

I don't know where the logic was that says she could overcome that. I don't understand why she got into it in the first place.

Logic and ethics are fundamentally the same, they are no more than duty to oneself

Logic cannot comprehend love; so much the worse for logic.

Elementary propositions consist of names.

All propositions are of equal value.

What we cannot speak about we must pass over in silence.