逻辑学的研究是对正确推理原则的研究。

I'm not going to tell them about the downsizing. If a patient has cancer, you don't tell them.

I don't believe in taking the right decisions. I take decisions and then make them right.

One can choose to go back toward safety or forward toward growth. Growth must be chosen again and again; fear must be overcome again and again.

在数学中，你不理解事物。你只是习惯了它们。

知识若不付诸实践，便毫无价值。