It is my conviction that pure mathematical construction enables us to discover the concepts and the laws connecting them, which gives us the key to the understanding of nature ... In a certain sense, therefore, I hold it true that pure thought can grasp reality, as the ancients dreamed.

The distinctions separating the social classes are false; in the last analysis they rest on force.

Out of clutter, find simplicity.

The payment of the worker is not determined by the value of his product.

I owe as much of my success to an uncompromising obstinacy as to any original ideas.

He who cherishes the value of cultures cannot fail to be a pacifist.

To obtain an assured favorable response from people, it is better to offer them something for their stomachs instead of their brains.