Keep learning. It's the only way to stay relevant in a fast-changing world.

"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."

The laser is to attosecond physics what the telescope was to astronomy.

I'm not a rapper, I'm a Hall of Famer.

"Memory is a tricky thing; it can be both a blessing and a curse."

我只和自己竞争，不和别人竞争。