Noman giveth to himself that liberty， to take from himself his life， or any part thereof.

The deepest problems of modern life derive from the claim of the individual to preserve the autonomy and individuality of his existence in the face of overwhelming social forces, of historical heritage, of external culture, and of the technique of life.

The only limit to our realization of tomorrow is our doubts of today.

Every decision we make today shapes the world we will live in tomorrow.

计算机科学中的真正挑战不是编写程序，而是理解计算的本质。