解释：想要变得刚强，必定先要保持柔和；想要变得强大，一定先要保持弱小。

数学是一种超越文化和语言障碍的通用语言。

Good means not merely not to do wrong， but rather not to desire to do wrong.

The best art is the art that stays with you.

"The key to success is to focus on goals, not obstacles."

A picture must be a thing in itself, not a representation of something else.