The exception tests the rule.

Science is the organized skepticism in the reliability of expert opinion

Science is of value because it can produce something.

I am not interested in what today's mathematicians find interesting.

When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

From a long view of the history of mankind the most significant event of the nineteenth century will be judged as Maxwell's discovery of the laws of electrodynamics.

To test whether you have learned an idea or a definition, rephrase what you just learned without using the new word.