To learn that it's easier to be told by others what to think and believe than it is to think for yourself.

Really great moral teachers never do introduce new moralities: it is quacks and cranks who do that.

I don't want people to say, 'Something is true because Tyson says it is true.' That's not critical thinking.

The more I learn about the universe, the less convinced I am that there's any sort of benevolent force that has anything to do with it, at all.

I am convinced that the act of thinking logically cannot possibly be natural to the human mind. If it were, then mathematics would be everybody's easiest course at school and our species would not have taken several millennia to figure out the scientific method.

Resulta difícil hablar de moral; lo que ha sucedido es que hemos inventado unos principios morales que ahora se hallan corrompidos, toda vez que no pueden ser puestos en práctica. Y cuando la moral se corrompe, entonces es peor que carecer de ella.