Social action, just like physical action, is steered by perception.

Fortunately I experienced Max Wertheimer's teaching in Berlin and collaborated for over a decade with Wolfgang Köhler. I need not emphasize my debts to these outstanding personalities. The fundamental ideas of Gestalt theory are the foundation of all our investigations in the field of the will, of affection, and of the personality.

If you want to learn about an organization, try to change it.

A successful individual typically sets his next goal somewhat, but not too much, above his last achievement.

Experience alone does not create knowledge.

Every psychological event depends upon the state of the person and at the same time on the environment, although their relative importance is different in different cases

No research without action, no action without research.