Being a teacher is back-breakingly difficult work. It is also extremely important work.

If you don't work on important problems, it's not likely that you'll do important work.

We must reject the easy impulses of bitterness and rancor and embrace the difficult work, but the important work, the vital work of finding a path forward together.

Obama is an intelligent man whose life and work experience sensitize him to class distinctions.

Your most important work is always ahead of you, never behind you.

The search for the truth is the most important work in the whole world, and the most dangerous.