Freedom is not given, it is taken.

科学无法解开自然的终极奥秘。那是因为，归根结底，我们自己正是我们试图解开的奥秘的一部分。

你必须不断思考你能做些什么来让世界变得更美好。

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.