"Peace comes from within. Do not seek it without."

I don't believe in pessimism. If something doesn't come up the way you want, forge ahead. If you think it's going to rain, it will.

The purpose of a habit is to remove that action from self-negotiation. You no longer expend energy deciding whether to do it. You just do it. Good habits can range from telling the truth， to flossing

Technology can help us monitor forests, but wisdom teaches us how to preserve them.

The only way to have a friend is to be one.

一个社会的竞争优势不是来自学校把乘法和元素周期表教得多么好，而是来自他们激发学生想象力和创造力的程度。

The truth will set you free. But not until it is finished with you.