A proof tells us where to concentrate our doubts.

You cannot hope to build a better world without improving the individuals. To that end, each of us must work for our own improvement and, at the same time, share a general responsibility for all humanity, our particular duty being to aid those to whom we think we can be most useful.

宇宙不仅比我们想象的更奇怪，而且比我们能够想象的还要奇怪。

The best traders are not the ones who are right the most, but the ones who lose the least when they are wrong.