Whatever you're meant to do, do it now. The conditions are always impossible.

The only thing that is certain is uncertainty.

The beauty of a mathematical proof lies in its simplicity and inevitability.

Man is so naturally good that when he does evil it is against his will.

The man who is anybody and who does anything is surely going to be criticized, vilified, and misunderstood.

唯一防御世界的围墙就是彻底了解它。