It is important that we relish the food we eat. If we cannot do this, but eat mechanically, our food does not do us that good it should, and we fail to be nourished and built up by it as we otherwise would be, if we could enjoy the food we take into the stomach.

The only thing that interests the physicist is finding out on what assumptions a framework of things can be constructed which will enable us to know how to use them mechanically. Physics, as I have said on another occasion, is the technique of techniques and the ars combinatoria for fabricating machines. It is a knowledge which has scarcely anything to do with comprehension.

Many things are mechanical and should remain mechanical. But mechanical thoughts, mechanical feelings-that is what has to be studied and can and should be changed. Mechanical thinking is not worth a penny. You can think about many things mechanically, but you will get nothing from it.