我不想模仿现实，我想创造现实。

农业的可持续性不是一种选择，而是生存的必需。

Not for the sake of our health, though it's often presented that way, but because it's an escape from the human anthill. It's an escape from our own competition, and our own dramas. And that's why ween joy looking at glaciers and oceans, and contemplating the Earth from outside its perimeters, etc. We like to feel in contact with something that is non-human, and that is so deeply important to us.

The measure of a good book is whether it makes you think, feel, and see the world differently.

你不能像那个站在水滑梯顶端过度思考的孩子。你必须滑下去。

中心地的等级反映了所提供的商品和服务的等级。

在数学中，提出问题的艺术必须比解决问题更有价值。