Security is sleeping in the back seat of the car...When you're a little kid, and you've ben somewhere with your Mom and Dad, and it's night, and you're riding home in the car, you can sleep in the back seat...You don't have to worry about anything...Your Mom and Dad are in the front seat, and they do all the worrying...But it doesn't last! Suddenly, you're grown up, and it can never be that way again!

The essence of computational complexity is to understand the limits of what can be computed efficiently.

The concept of truth is inseparable from the concept of freedom.

科学的美妙之处在于它让我们能够探索未知，并做出可以改变世界的发现。