“One of the great commandments of science is: Mistrust arguments from authority.”

An atheist is someone who is certain that God does not exist, someone who has compelling evidence against the existence of God.

The only thing we’ve found that makes the emptiness bearable, is each other.

Exploration is in our nature. We began as wanderers, and we are wanderers still. We have lingered long enough on the shores of the cosmic ocean. We are ready at last to set sail for the stars.

If it can be destroyed by the truth, it deserves to be destroyed by the truth.

Your god is too small for my universe.

A galaxy is composed of gas and dust and stars – billions upon billions of stars. Every star may be a sun to someone.

Extinction is the rule. Survival is the exception.

I don’t want to believe. I want to know.

If we ruin the earth, there is no place else to go.

The significance of our lives and our fragile planet is then determined only by our own wisdom and courage.

All civilizations become either spacefaring or extinct.

If we continue to accumulate only power and not wisdom, we will surely destroy ourselves.

Across the sea of space, the stars are other suns.

You are worth about 3 dollars worth in chemicals.

We live on a mote of dust suspended in a sunbeam.

We can judge our progress by the courage of our questions and the depth of our answers, our willingness to embrace what is true rather than what feels good.

Underlying most arguments against the free market is a lack of belief in freedom itself.

Whoever builds his faith exclusively on demonstrative proofs and deductive arguments, builds a faith on which it is impossible to rely. For he is affected by the negativities of constant objections. Certainty(al-yaqin) does not derive from the evidences of the mind but pours out from the depths of the heart.

I’m not sure if you know this but your peace is not up for debate.

You cannot be sure that you are right unless you understand the arguments against your views better than your opponents do.

In my personal life I’m not very tough at all, but in my professional life, having to deal with being a woman in a man’s world, I’m really tough. I never back down from a fight or an argument. I’m willing to stand there toe to toe with anyone.

The common argument that crime is caused by poverty is a kind of slander on the poor.

The best words for resolving a disagreement are, “I could be wrong; I often am.” It’s true.

Arguments about Scripture achieve nothing but a stomachache and a headache.