Don't let the noise of others' opinions drown out your own inner voice.

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

Stay hungry. Stay foolish.

The only way to do great work is to love what you do.

From a scientific point of view, our mission is to seek answers to the fundamental questions about the universe. Many are open - we don't know about dark matter, which accounts for a quarter of the universe's matter, nor do we know why there's antimatter.

It will sometimes strike a scientific man that the philosophers have been less intent on finding out what the facts are, than on inquiring what belief is most in harmony with their system.

Once upon a time, science, philosophy, and theology were disciplines largely undifferentiated from one another, and proving the existence of God was a fairly commonplace intellectual exercise. But as the scientific method became increasingly refined, particularly through the nineteenth century, science and religion grew apart.

Cosmos' wouldn't deserve its place in primetime evening network television were it not a landscape on which compelling stories were told. People, when they watch TV in the evening, want to see stories, and science simply tells the best stories.