Don't listen to their words, fix your attention on their deeds.

It seems to me that the idea of a personal God is an anthropological concept which I cannot take seriously. I feel also not able to imagine some will or goal outside the human sphere. My views are near those of Spinoza: admiration for the beauty of and belief in the logical simplicity of the order which we can grasp humbly and only imperfectly. I believe that we have to content ourselves with our imperfect knowledge and understanding and treat values and moral obligations as a purely human problem-the most important of all human problems.

No problem is ever solved in the same consciousness thas was used to create it.

A conviction akin to religious feeling of the rationality or intelligibility of the world lies behind all scientific work of a high order.

The stupid are invincible.

I do not play games. There is not time for it. When I get through with work, I don't want anything that requires the working of the mind.

Concern for man himself and his fate must always form the chief interest of all technical endeavors, concern for the great unsolved problems of the organization of labor and the distribution of goods-in order that the creations of our mind shall be a blessing and not a curse to mankind. Never forget this in the midst of your diagrams and equations.