Contradiction is not a sign of falsity, nor the lack of contradiction a sign of truth.
All concord's born of contraries.
People who honestly mean to be true really contradict themselves much more rarely than those who try to be consistent.
Do I contradict myself? Very well then I contradict myself, (I am large, I contain multitudes).
When a contradiction is impossible to resolve except by a lie, then we know that it is really a door.
I have forced myself to contradict myself in order to avoid conforming to my own taste.
The world is a perpetual caricature of itself; at every moment it is the mockery and the contradiction of what it is pretending to be.
Let me never fall into the vulgar mistake of dreaming that I am persecuted whenever I am contradicted.
The well-bred contradict other people. The wise contradict themselves.
Doublethink means the power of holding two contradictory beliefs in one's mind simultaneously, and accepting both of them.