I cannot seriously believe in it [quantum theory] because the theory cannot be reconciled with the idea that physics should represent a reality in time and space, free from spooky actions at a distance [spukhafte Fernwirkungen].

This topic brings me to that worst outcrop of herd life, the military system, which I abhor... This plague-spot of civilization ought to be abolished with all possible speed. Heroism on command, senseless violence, and all the loathsome nonsense that goes by the name of patriotism -- how passionately I hate them!

An evening everyone agrees, is a lost evening.

A hundred times every day I remind myself that my inner and outer life are based on the labors of others.

The world we have created is a product of our thinking; it cannot be changed without changing our thinking. If we want to change the world we have to change our thinking...no problem can be solved from the same consciousness that created it. We must learn to see the world anew.

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

The mathematician knows some things, no doubt, but not those things one usually wants to get from him.