计算复杂性的研究不仅仅是关于解决问题，还在于理解可计算性的极限。
The study of computational complexity is not just about solving problems, but also about understanding the limits of what can be computed.
The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.
未来并非在我们前方。它已经发生。
图画是第一位的，文字是后来才有的。
You can't be afraid to fail. It's the only way you succeed.
The camera makes everyone a tourist in other people’s reality, and eventually in one’s own.
