A great idea goes through three stages on its way to acceptance: 1) it is dismissed as nonsense, 2) it is acknowledged as true, but insignificant, 3) finally, it is seen to be important, but not really anything new.

The total possible consciousness may be split into parts which co-exist but mutually ignore each other.

The god whom science recognizes must be a God of universal laws exclusively, a God who does a wholesale, not a retail business. He cannot accommodate his processes to the convenience of individuals.

The general law is that no mental modification ever occurs which is not accompanied or followed by a bodily change.

Our acts of voluntary attending, as brief and fitful as they are, are nevertheless momentous and critical, determining us, as they do, to higher or lower destinies.

The first lecture in psychology that I ever heard was the first I ever gave.

The simplest rudiment of mystical experience would seem to be that deepened sense of the significance of a maxim or formula which occasionally sweeps over one.