数学不仅仅是关于数字、方程、计算或算法，而是关于理解。
计算机是一种交互式媒介，是第一个允许用户操纵过程表示的媒介。
The truth is always exciting. Speak it, then. Life is dull without it.
The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
The future is not something we enter; it's something we create.
History is not just the story of the past, but a mirror to the present and a window to the future.