Combinatorics is the art of counting without counting.

At seventy, I’m just getting started. Watch me.

We don't just look at art, we enter into relationship with it.

Certification programs are more than stickers on wood products; they represent a promise to our planet.

记忆是一个充满版本的档案，而不是绝对真理。

Your time is limited, so don't waste it living someone else's life.