“If you can’t explain it simply, you don’t understand it well enough.”

Imperfect action beats perfect inaction every time.

Liberty, taking the word in its concrete sense, consists in the ability to choose

It's easy to fool the eye but it's hard to fool the heart.

Although the world is full of suffering, it is also full of the overcoming of it.

Despite all of the ghastliness in the world, human beings are made for goodness.

Setting goals is the first step in turning the invisible into the visible