Neil deGrasse Tyson

For me, I am a cosmic optimist. I always think that we will find solutions to our problems.

I'm not saying there are no aliens. I'm just saying the evidence is insufficient for me to conclude it.

I'm an agnostic. I'm not an atheist, because I don't know enough to be an atheist.

If you are a scientist, you are a scientist. You don't have to be a 'black scientist' or a 'woman scientist.'

My goal is to empower people to use the methods and tools of science to analyze information and come to their own conclusions.

The universe is expanding. We are all expanding. Everything is expanding. What are you doing?

I'm not trying to convert anyone to atheism. I'm trying to convert people to science.

The great thing about science is that it's a self-correcting enterprise. It doesn't care about your feelings.

Knowing what's true is not the same as knowing what's right.

The universe is not obliged to be beautiful to you. It just is.

If you want to know what it means to be alive, look at the stars.

I'm an educator. I'm a scientist. I'm a communicator. I'm not a politician.

The greatest discoveries in science are not always the ones that get the most attention.

I'm not afraid of questions. I'm afraid of people who don't ask questions.

The universe is a hostile place. It will kill you if you're not careful.

We are all connected. To each other, biologically. To the Earth, chemically. To the rest of the universe, atomically.

Science is not a body of facts. Science is a way of thinking.

If you don't know how to think, you're a victim of those who do.

The universe is not about you. It's about everything.

The universe is a symphony, and we are all instruments in it.