In general, we can think of data as defined by some collection of selectors and constructors, together with specified conditions that these procedures must fulfill in order to be a valid representation. -- SICP, What is meant by data?

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

If everything seems under control, you're not going fast enough. -- Mario Andretti

We really have to get over the idea that some stuff is just worth knowing even if you never do anything with it. Human memories happily erase stuff that has no purpose, so why try to fill up children's heads with such stuff? -- Roger Schank, Engines for Education

The art of getting someone else to do something you want done because he wants to do it [Leadership]. -- Dwight D. Enseinhover.

I was talking recently to a friend who teaches at MIT. His field is hot now and every year he is inundated by applications from would-be graduate students. "A lot of them seem smart," he said. "What I can't tell is whether they have any kind of taste." -- Paul Graham

Our greatest fear should not be of failure but of succeeding at things in life that don’t really matter. ~Francis Chan

We become what we think about most of the time, and that’s the strangest secret. ~Earl Nightingale

Life is not measured by the number of breaths we take, but by the moments that take our breath away. –Maya Angelou

The best time to plant a tree was 20 years ago. The second best time is now. –Chinese Proverb