"We are doomed if skepticism and critical thinking skills do not become standard components of humankind at some point in this century. If we continue to fail to teach the majority of children on Earth how to doubt, how to ask questions and how to think for themselves, we will self-destruct. Think about it, how can global civilization continue to survive with the same high levels of stupidy and fantasy while the ability to create increasingly powerful weapons rises? We are in a race against ourselves."
"With the scientific view, or my father’s view, that we should look to see what’s true and what may be or may not be true, once you start doubting, which I think to me is a very fundamental part of my soul, to doubt and to ask, and when you doubt and ask it gets a little harder to believe. You see, one thing is, I can live with doubt and uncertainty and not knowing. I think it’s much more interesting to live not knowing than to have answers which might be wrong. I have approximate answers and possible beliefs and different degrees of certainty about different things, but I’m not absolutely sure of anything and there are many things I don’t know anything about, such as whether it means anything to ask why we’re here, and what the question might mean. I might think about it a little bit, and if I can’t figure it out, then I go on to something else, but I don’t have to know an answer, I don’t feel frightened by not knowing things, by being lost in a mysterious universe without having any purpose which is the way it really is so far as I can tell. It doesn’t frighten me.
— Richard P. Feynman"
"Plainly nobody will be afraid who believes nothing can happen to him… Fear is felt by those who believe something is likely to happen to them… People do not believe this when they are, or think they are, in the midst of great prosperity, and are in consequence insolent, contemptuous, and reckless… But if they are to feel the anguish of uncertainty, there must be some faint expectation of escape.
— Aristotle, Rhetoric, 382 B.C."