You have to believe in yourself when no one else does.

Courage doesn't always roar. Sometimes courage is the quiet voice at the end of the day saying, "I will try again tomorrow."

让我真真实实地活着吧，我的上帝，这样，死对于我也就成了真实的了。

物理定律必须以独立于坐标系选择的方式表述。

The reason why men enter into society is the preservation of their property.

人体对我来说是最重要的东西。

你们会在严峻的现实之下选择放弃，还是会义无反顾地前行？

The most advanced technology is worthless if farmers can't use it effectively.

"I’m not playing for the records. I’m just trying to enjoy my tennis."

心理学的真理存在于实践经验中。