To stimulate creativity one must develop childlike inclination for play and the childlike desire for recognition.
Albert EinsteinThe dog is very smart. He feels sorry for me because I receive so much mail; that's why he tries to bite the mailman.
Albert EinsteinA theory is the more impressive the greater the simplicity of its premises is, the more different kinds of things it relates, and the more extended its area of applicability.
Albert EinsteinWe come now to the question: what is a priori certain or necessary, respectively in geometry (doctrine of space) or its foundations? Formerly we thought everything; nowadays we think nothing. Already the distance-concept is logically arbitrary; there need be no things that correspond to it, even approximately.
Albert Einstein