The best way to learn mathematics is to do mathematics.

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.

宇宙的初始条件是一个深刻的谜，膨胀为宇宙为何看起来如此提供了一个可能的解释。