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The true test of a mathematical idea is its ability to inspire further thought.
If you want to fly, you have to give up the things that weigh you down.
There are no dull subjects. There are only dull writers.
To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others.
Believe in yourself and all that you are.
"Courage is not the absence of fear, but the triumph over it."