If I would follow your advice and Jesus could perceive it, he, as a Jewish teacher, surely would not approve of such behavior.

Physics is essentially an intuitive and concrete science. Mathematics is only a means for expressing the laws that govern phenomena.

We are boxed in by the boundary conditions of our thinking

It followed from the special theory of relativity that mass and energy are both but different manifestations of the same thing - a somewhat unfamiliar conception for the average mind. Furthermore, the equation E = mc², in which energy is put equal to mass, multiplied by the square of the velocity of light, showed that very small amounts of mass may be converted into a very large amount of energy and vice versa.

Agreements about what is good or not, are usually not worth much. It is very much like art, is it not an art to lead a good life?

I am content in my later years. I have kept my good humor and take neither myself nor the next person seriously.

We come now to the question: what is a priori certain or necessary, respectively in geometry (doctrine of space) or its foundations? Formerly we thought everything; nowadays we think nothing. Already the distance-concept is logically arbitrary; there need be no things that correspond to it, even approximately.