"I don't think about the past. The only thing that matters is the everlasting present."

Psychology must be based on direct experience, not inference.

The unity of mathematics is not an illusion but a reality waiting to be uncovered.

高尚的人是履行自己职责而不关心结果的人。

我不害怕风暴，因为我正在学习如何驾驶我的船。