Dogmatic common sense is the death of philosophic adventure. The universe is vast.

Common sense is genius in homespun.

I have suffered a great deal from writers who have quoted this or that sentence of mine either out of its context or in juxtaposition to some incongruous matte…

But you can catch yourself entertaining habitually certain ideas and setting others aside; and that, I think, is where our personal destinies are largely decid…

The more I examine the universe and the details of its architecture, the more evidence I find that the universe in some sense must have known we were coming.

I said I liked being half-educated; you were so much more surprised at everything when you were ignorant.

I live on Earth at present, and I don't know what I am. I know that I am not a category. I am not a thing - a noun. I seem to be a verb, an evolutionary proces…