The world must be set in order. The time has come when ethics must be dealt with by science, and never again by mere opinion.

The most thought-provoking thing in our thought-provoking time is that we are still not thinking.

事实是每个人都相信的简单陈述。它是无辜的，除非被证明有罪。假设是没有人愿意相信的新颖建议。它是有罪的，直到被证明有效。