Every painting is a failure in some way, but that's what keeps you going.

The past is a shadow that follows us, always present, always haunting.

We say of some things that they can't be forgiven, or that we will never forgive ourselves. But we do—we do it all the time.

儿童有着他自己的人格，他自身具有创造精神的美和尊严。这种美和尊严是永远不能磨灭的，所以他的纯洁而非常敏感的心灵需要我们最审慎的爱护。

可持续性不是一种趋势，而是我们对未来的责任。

What we have to do is find a way to celebrate our diversity and debate our differences without fracturing our communities.

The best decisions are made when you combine data with human intuition.

如果你知道自己想要什么，世界就是一个可塑的地方。

在数学中，提出问题的艺术必须比解决问题更有价值。