要说服某人相信真理，仅仅陈述它是不够的，它必须被发现。

The world is full of people who have never, since childhood, met an open doorway with an open mind.

If you can't explain it simply, you don't understand it well enough.

The essence of mathematics lies in its freedom.

信任是合作的货币，必须每天努力赢得。