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

Good work is no done by ‘humble’ men. -- H. Hardy, A mathematician's apology.

Argue with idiots, and you become an idiot. If you compete with slaves you become a slave. -- Paul Graham and Norbert Weiner, respectively

What I didn't understand was that the value of some new acquisition wasn't the difference between its retail price and what I paid for it. It was the value I derived from it. Stuff is an extremely illiquid asset. Unless you have some plan for selling that valuable thing you got so cheaply, what difference does it make what it's "worth?" The only way you're ever going to extract any value from it is to use it. And if you don't have any immediate use for it, you probably never will. -- Paul Graham

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

I had to learn how to teach less, so that more could be learned. -- Tim Gallwey, The inner game of work

The most common way people give up their power is by thinking they don’t have any. –Alice Walker

Be miserable. Or motivate yourself. Whatever has to be done, it’s always your choice. ~Wayne Dyer

Every strike brings me closer to the next home run. –Babe Ruth

Limitations live only in our minds. But if we use our imaginations, our possibilities become limitless. –Jamie Paolinetti