A wheel that can be turned though nothing else moves with it, is not a part of the mechanism.

You learned the concept 'pain' when you learned language.

The difference between a good and a poor architect is that the poor architect succumbs to every temptation and the good one resists it.

The problems are solved, not by giving new information, but by arranging what we have always known.

The philosopher is not a citizen of any community of ideas, that is what makes him a philosopher.

Someone who knows too much finds it hard not to lie.

Courage, not cleverness; not even inspiration, is the grain of mustard that grows up to be a great tree.