Space is big. You just won’t believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.
Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by science.
To him who looks upon the world rationally, the world in its turn presents a rational aspect. The relation is mutual.
I am heartened to find so much wit in you, that you’d give thought to consequences and choose your way with reason, not passion only.
I haven’t failed. I’ve just found 10,000 ways that won’t work.
If you’re afraid – don’t do it, – if you’re doing it – don’t be afraid.
Education is the ability to listen to almost anything without losing your temper or your self-confidence.
What could an entirely rational being speak of with another entirely rational being?
Refusal to believe until proof is given is a rational position; denial of all outside of our own limited experience is absurd.