"You can know the name of a bird in all the languages of the world, but when you're finished, you'll know absolutely nothing whatever about the bird... So let's look at the bird and see what it's doing -- that's what counts."
"Physics isn't the most important thing. Love is."
"Philosophy of science is about as useful to scientists as ornithology is to birds."
"I learned very early the difference between knowing the name of something and knowing something."
"Religion is a culture of faith; science is a culture of doubt."
"We are at the very beginning of time for the human race. It is not unreasonable that we grapple with problems. But there are tens of thousands of years in the future. Our responsibility is to do what we can, learn what we can, improve the solutions, and pass them on."