It is very difficult to make an accurate prediction, especially about the future.

Your theory is crazy, but it's not crazy enough to be true.

We depend on our words... Our task is to communicate experience and ideas to others. We must strive continually to extend the scope of our description, but in such a way that our messages do not thereby lose their objective or unambiguous character... We are suspended in language in such a way that we cannot say what is up and what is down. The word "reality" is also a word, a word which we must learn to use correctly.

Never express yourself more clearly than you are able to think.

The very nature of the quantum theory ... forces us to regard the space-time coordination and the claim of causality, the union of which characterizes the classical theories, as complementary but exclusive features of the description, symbolizing the idealization of observation and description, respectively.

Predition is risky, especially of the future.

Sometimes the child in one behaves a certain way and the rest of oneself follows behind, slowly shaking its head.