Contradictions do not exist. Whenever you think you are facing a contradiction, check your premises. You will find that one of them is wrong.
– Ayn Rand
After all, what would be “beautiful” if the contradiction had not first become conscious of itself, if the ugly had not first said to itself: “I am ugly”?
– Friedrich Nietzsche
I force myself to contradict myself in order to avoid conforming to my own taste.
– Marcel Duchamp