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It is said that the real winner is the one who lives in today but able
to see tomorrow.
-- Juan Meng, Reviewing "The future of ideas" by Lawrence Lessig

An interpreter raises the machine to the level of the user program; a
compiler lowers the user program to the level of the machine language.
-- SICP

Lisp programmers know the value of everything but the cost of nothing.
-- Alan J. Perlis

Understanding why C++ is the way it is helps a programmer use it well. A deep
understanding of a tool is essential for an expert craftsman.
-- Bjarne Stroustrap

We now come to the decisive step of mathematical abstraction: we forget
about what the symbols stand for. ...[The mathematician] need not be
idle; there are many operations which he may carry out with these
symbols, without ever having to look at the things they stand for.
-- Hermann Weyl, The Mathematical Way of Thinking