The worth of a psychological theory is measured by its usefulness.

Success is not final, failure is not fatal: It is the courage to continue that counts.

他人很重要。

在高压情况下，你必须相信自己的直觉。

You think you know when you can learn, are more sure when you can write, even more when you can teach, but certain when you can program.

The laws of behavior are as precise as those of physics.