The thinking that got us to where we are is not the thinking that will get us to where we want to be.

The great need to grasp principles had caused me to spend most of my time on fruitless persuits.

When a man is sufficiently motivated, discipline will take care of itself.

In the beginning (if there was such a thing), God created Newton's laws of motion together with the necessary masses and forces. This is all; everything beyond this follows from the development of appropriate mathematical methods by means of deduction.

It occurred to me by intuition, and music was the driving force behind that intuition. My discovery was the result of musical perception.

It's no accident that capitalism has brought with it progress, not merely in production but also in knowledge. Egoism and competition are, alas, stronger forces than public spirit and sense of duty.

As our circle of knowledge expands, so does the circumference of darkness surrounding it.