Abstraction is a form of data compression: absolutely necessary, because human short-term memory is so small, but the critically important aspect of abstraction is the algorithm that gets you from the name back to the "uncompressed" details. -- Bruce Wilder (blog post comment)

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

Abstraction is a form of data compression: absolutely necessary, because human short-term memory is so small, but the critically important aspect of abstraction is the algorithm that gets you from the name back to the "uncompressed" details. -- Bruce Wilder (blog post comment)

The function of good software is to make the complex appear to be simple. -- Grady Booch

A person won't become proficient at something until he or she has done it many times. In other words., if you want someone to be really good at building a software system, he or she will have to have built 10 or more systems of that type. -- Philip Greenspun

The venerable master Qc Na was walking with his student, Anton. Hoping to prompt the master into a discussion, Anton said "Master, I have heard that objects are a very good thing - is this true?" Qc Na looked pityingly at his student and replied, "Foolish pupil - objects are merely a poor man's closures." Chastised, Anton took his leave from his master and returned to his cell, intent on studying closures. He carefully read the entire "Lambda: The Ultimate..." series of papers and its cousins, and implemented a small Scheme interpreter with a closure-based object system. He learned much, and looked forward to informing his master of his progress. On his next walk with Qc Na, Anton attempted to impress his master by saying "Master, I have diligently studied the matter, and now understand that objects are truly a poor man's closures." Qc Na responded by hitting Anton with his stick, saying "When will you learn? Closures are a poor man's object." At that moment, Anton became enlightened. -- Anton van Straaten (Na = Norman Adams, Qa = Christian Queinnec)

Real difficulties can be overcome; it is only the imaginary ones that are unconquerable. ~Theodore N. Vail

People who succeed have momentum. The more they succeed, the more they want to succeed, and the more they find a way to succeed. Similarly, when someone is failing, the tendency is to get on a downward spiral that can even become a self-fulfilling prophecy. ~Tony Robbins

The most difficult thing is the decision to act, the rest is merely tenacity. –Amelia Earhart

We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light. –Plato