We ought not to act and speak as if we were asleep.

The power of positive thinking is the ability to generate a feeling of certainty in yourself when nothing in the environment supports you.

The brave may not live forever, but the cautious do not live at all.

如今网络上到处都是免费的教育资源，真正稀缺的是对学习的渴望。

自然并不比你想的更复杂，而是比你能想到的更复杂。

我不相信运气。我相信努力。

Thought and behavior are inseparable in the living organism.