未来不是沉重的，而是轻盈的。
The future is not heavy, but light.
The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.
追求科学不仅仅是追求理解。它是追求一种来自知道我们不知道多少的智慧。
The only way to discover the limits of the possible is to go beyond them into the impossible.