Measuring programming progress by lines of code is like measuring aircraft building progress by weight. -- Bill Gates

Vigorous writing is concise. A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts. This requires not that the writer make all sentences short or avoid all detail and treat subjects only in outline, but that every word tell. -- William Strunk, Jr. (The Elements of Style)

Remember: you are alone. Every time you can get help from someone, it is an opportunity: you should eagerly size it. But then, promptly return to normal mode: you are alone and you must be prepared to solve every problem yourself. -- Eric KEDJI

If it looks like a duck, walks like a duck, and quacks like a duck, it's a duck. -- Official definition of "duck typing"

A tail call allows a function to return the result of another function without leaving an entry on the stack. Tail recursion is a specific case of tail calling. -- ASPN : Python Cookbook : Explicit Tail Call

Simplicity takes effort-- genius, even. -- Paul Graham

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A truly rich man is one whose children run into his arms when his hands are empty. –Unknown

Definiteness of purpose is the starting point of all achievement. –W. Clement Stone

The mind is everything. What you think you become. –Buddha