Sustainability must be profitable, or it won't be sustainable.

"To live is the rarest thing in the world. Most people exist, that is all."

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

I have to say to myself that some birds aren't very close. Their feathers are just too bright. When they fly away, you know it's a sin to lock them up, and you'll be inspired by them. Still, the place you live in is that much more drab and empty that they're gone. I think I really miss my friends.

"We are all in the gutter, but some of us are looking at the stars."

那些疯狂到认为自己可以改变世界的人，才是真正改变世界的人。

唯一真实的旅程是内心的旅程。

故事的力量在于它能够连接我们。