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... when a man is out of his depth, ..., he has to swim all the same.
The first principle is that you must not fool yourself and you are the easiest person to fool.
Richard P. Feynman
Caltech's 1974 commencement address: Cargo Cult Science
It doesn't matter how smart you are, unless you stop and think.
Thomas Sowell
The source of the exhilaration associated with computer programming is the continual unfolding within the mind and on the computer of mechanisms expressed as programs and the explosion of perception they generate.
Alan J. Perlis
Forward to Structure and Interpretation of Computer Programs

Emphasis mine.

Nothing is more important than to see the sources of invention which are, in my opinion, more interesting than the inventions themselves.
George Polya
How to Solve It
To doubt everything and to believe everything are two equally convenient solutions; each saves us from thinking.
Henri Poincare
Science and Hypothesis
Is it possible that software is not like anything else, that is is meant to be discarded: that the whole point is to always see it as a soap bubble.
Alan J. Perlis
Epigrams on Programming
We do not learn from experience... we learn from reflecting on experience.
John Dewey
Every great cause begins as a movement, becomes a business, and eventually degenerates into a racket.
Eric Hoffer
The Temper of Our Time