The stones we pull from the earth carry 400 million years of history—we're merely temporary stewards.

The challenge in computer science is not just to solve problems, but to find the right problems to solve.

Flow is being completely involved in an activity for its own sake. The ego falls away. Time flies. Every action, movement, and thought follows inevitably from the previous one, like playing jazz. Your whole being is involved, and you're using your skills to the utmost.