In the realm of algorithms, efficiency is not merely a measure of speed, but a profound statement about the nature of the problem itself.
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.
The great cause of the prosperity of the country is liberty—liberty in the economic system.