Familiar things happen, and mankind does not bother about them. It requires a very unusual mind to undertake the analysis of the obvious.
Alfred North Whitehead
Ideas won't keep; something must be done about them.
Not ignorance, but ignorance of ignorance, is the death of knowledge.
Fundamental progress has to do with the reinterpretation of basic ideas.
The deepest definition of youth is life as yet untouched by tragedy.
Almost all new ideas have a certain aspect of foolishness when they are first produced.