The truth doesn't always set you free. Sometimes it just makes you see the chains.

回忆，即使是最珍贵的回忆，凋零的速度惊人的快。但我不服，我最珍视的回忆，我从不见它凋零。

You’ll get 10x better results by elevating good behavior rather than punishing bad behavior， especially in children and animals.

钢铁的强度只与制造它的人的强度相匹配。

学习数学的最好方法就是做数学。