The past, like the future, is indefinite and exists only as a spectrum of possibilities.

I like crossing the imaginary boundaries people set up between different fields—it's very refreshing.

Mental processes are tools for living, and their worth is in their use.

唯一能显著影响行为的学习是自我发现、自我吸收的学习。

你的态度，而不是你的能力，将决定你的高度。

Quality is more important than quantity. One home run is much better than two doubles.

I have always been a stranger in this world, a visitor, a tourist.

你越努力，就越幸运。