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.
Never memorize something that you can look up.
Study without desire spoils the memory, and it retains nothing that it takes in.
To him who looks upon the world rationally, the world in its turn presents a rational aspect. The relation is mutual.
You can never be overdressed or overeducated.
The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.
I think that we must find some way to get more common sense, more rationality, in our decisions and less emotion.
Logic is like the sword–those who appeal to it shall perish by it.
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.