If you want to live a happy life, tie it to a goal, not to people or objects.

One ought to be ashamed to make use of the wonders of science embodied in a radio set, the while appreciating them as little as a cow appreciates the botanic marvels in the plants she munches.

Is it not better for a man to die for a cause in which he believes, such as peace, than to suffer for a cause in which he does not believe, such as war?

No worthy problem is ever solved within the plane of its original conception.

Thought is the organizing factor in man, intersected between the causal primary instincts and the resulting actions.

The formulation of the problem is often more essential than its solution, which may be merely a matter of mathematical or experimental skill.

The legs are the wheels of creativity.