It is no small art to sleep: for that purpose you must keep awake all day.
Everything must be made as simple as possible. But not simpler.
Science and religion are not at odds. Science is simply too young to understand.
The whole of science is nothing more than a refinement of everyday thinking.
Refusal to believe until proof is given is a rational position; denial of all outside of our own limited experience is absurd.
Education consists mainly of what we have unlearned.
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.
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.
You can never be overdressed or overeducated.
During times of universal deceit, telling the truth becomes a revolutionary act.