It would be interesting to see the Behaviorists deny that the writing of a mathematical treatise, or of some new theory of quantum mechanics represents a form of human behavior which they should study. Some day they must face the fact that they have neglected to consider a great many forms of human behavior - the most characteristic forms at that - and that therefore, they could not produce an adequate theory of the nature of the 'human mind'.

...provided we could define all terms. But this is impossible... We thus see that all linguistic schemes, if analyzed far enough, would depend on undefined ter…

Aristotelian , Euclidian [line, space, length] and Newtonian [speed of light] systems... have a few unjustified infinities too many: when such an infinity is i…

[A Game:] We begin by asking the meaning of every word uttered:Then we ask the meaning of the words used in the definitions and, and this process is continued …

The poets and philosophers before me discovered the unconscious; what I discovered was the scientific method by which the unconscious can be studied.

Anyone who is not shocked by quantum theory has not understood it.

As for Adler, I was much impressed by a personal experience. Once, in 1919, I reported to him a case which to me did not seem particularly Adlerian, but which …