The world is a dangerous place. Not because of the people who are evil; but because of the people who don't do anything about it.
All such action would cease if those powerful elemental forces were to cease stirring within us.
For every action, there is a reaction.
The true definition of madness is repeating the same action, over and over, hoping for a different result.
Only morality in our actions can give beauty and dignity to life.
I believe in Spinoza's God who reveals himself in the orderly harmony of what exists, not in a God who concerns himself with fates and actions of human beings
Music has no effect on research work, but both are born of the same source and complement each other through the satisfaction they bestow
The same thinking and actions that created our problems cannot be used to solve them.
There is no greater satisfaction for a just and well-meaning person than the knowledge that he has devoted his best energies to the service of the good cause.
Thought is the organizing factor in man, intersected between the causal primary instincts and the resulting actions.
Fear or stupidity has always been the basis of most human actions.
The most important human endeavor is the striving for morality in our actions.
You imagine that I look back on my life's work with calm satisfaction. But from nearby it looks quite different. There is not a single concept of which I am convinced that it will stand firm, and I feel uncertain whether I am in general on the right track.
Anyone who has never made a mistake has never tried anything new.