Men become superstitious, not because they have too much imagination, but because they are not aware that they have any.
Theory helps us to bear our ignorance of facts.
People never believe in volcanoes until the lava actually overtakes them.
There is no greater stupidity or meanness than to take uniformity for an ideal.
Boston was a moral and intellectual nursery, always busy applying first principles to trifles.
The universe, as far as we can observe it, is a wonderful and immense engine.... If we dramatize its life and conceive its spirit, we are filled with wonder, terror and amusement, so magnificent is the spirit.