陈述是传达信息的手段，承诺是作出承诺的手段。
A statement is a means to convey information， a promise is a means to make a commitment.
The study of computational complexity is not just about solving problems, but also about understanding the limits of what can be computed.
We are all broken, that's how the light gets in.
We must listen to the whispers of the ancestors, for they hold the wisdom of the ages.
