Predition is risky, especially of the future.

When searching for harmony in life one must never forget that in the drama of existence we are ourselves both actors and spectators.

Everything we call real is made of things that cannot be regarded as real.

Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.

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.

If you aren't confused by quantum mechanics, you haven't really understood it.

Einstein, stop telling God what to do!