If we wish to imitate the physical sciences, we must not imitate them in their contemporary, most developed form; we must imitate them in their histo…

- Wolfgang Kohler

It is hardly an exaggeration to say that a chimpanzee kept in solitude is not a real chimpanzee at all.

- Wolfgang Kohler

It would be interesting to inquire how many times essential advances in science have first been made possible by the fact that the boundaries of spec…

- Wolfgang Kohler

It has sometimes been said that we find nowhere in nature an analogue of the difference between happens and is, on the one hand, and ought, on the ot…

- Wolfgang Kohler

Psychology is a very unsatisfactory science.

- Wolfgang Kohler