There is no hope for any speculation that does not look absurd at first glance.

You can recognize a small truth because its opposite is a falsehood. The opposite of a great truth is another truth.

When it comes to atoms, language can be used only as in poetry.

Truth is something that we can attempt to doubt, and then perhaps, after much exertion, discover that part of the doubt is not justified.

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.

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

Some things are so serious, they can only be joked about.