In mathematics, as in life, the most elegant solutions often arise from a deep understanding of the problem.

That is what learning is. You suddenly understand something you've understood all your life, but in a new way.

Everything's not lost.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.