Hunger, love, pain, fear are some of those inner forces which rule the individual’s instinct for self preservation.

It is not so important where one settles down. The best thing is to follow your instincts without too much reflection.

It occurred to me by intuition, and music was the driving force behind that intuition. My discovery was the result of musical perception.

One should not pursue goals that are easily achieved. One must develop an instinct for what one can just barely achieve through one’s greatest efforts.

The only real valuable thing is intuition.

The supreme task of the physicist is to arrive at those universal elementary laws from which the cosmos can be built up by pure deduction. There is no logical path to these laws; only intuition, resting on sympathetic understanding of experience, can reach them.

There is no logical way to the discovery of these elemental laws. There is only the way of intuition, which is helped by a feeling for the order lying behind the appearance.

Though our conduct seems so very different from that of the higher animals, the primary instincts are much alike in them and in us.