"The important thing in science is not so much to obtain new facts as to discover new ways of thinking about them."

The world is so unpredictable. Things happen suddenly, unexpectedly. We want to feel we are in control of our own existence. In some ways we are, in some ways we're not.

教育的第一步是了解孩子。

The best mathematics is not just rigorous; it is also elegant.

质量不是一种行为，而是一种习惯。