In mathematics, the most profound ideas often arise from the simplest observations.

The future is not a gift. It is an achievement.

我画的角色不是孩子，他们有一种叛逆的精神。

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

The best way to learn mathematics is to do mathematics.

Sustainability is not an option; it's a necessity for long-term success.

计算机科学家的主要挑战不是被自己制造的复杂性所迷惑。

我相信教育改变世界的力量。