A Quote by Paul Ehrenfest

Physics is simple, but subtle. — © Paul Ehrenfest
Physics is simple, but subtle.
Football isn't nuclear physics, but it's not so simple that you can make it simple. It takes some explaining to get it across.
The problem of physics is how the actual phenomena, as observed with the help of our sense organs aided by instruments, can be reduced to simple notions which are suited for precise measurement and used of the formulation of quantitative laws. Experiment and Theory in Physics
The amount of subtle and beautiful physics that's necessary to make a smartphone work is enormous.
This all-pervading power is the power of divine love. It thinks. It organizes. It plans. It loves. It is the one which is the subtle of the ether, you can call it. It is the subtle of the matter. It is the subtle of your emotions. It is the subtle of your mental power. It is the subtle of your evolutionary power, but all integrated and coordinated in complete synchronization.
My physics teacher, Thomas Miner was particularly gifted. To this day, I remember how he introduced the subject of physics. He told us we were going to learn how to deal with very simple questions such as how a body falls due to the acceleration of gravity.
It seems that every practitioner of physics has had to wonder at some point why mathematics and physics have come to be so closely entwined. Opinions vary on the answer. ..Bertrand Russell acknowledged..'Physics is mathematical not because we know so much about the physical world, but because we know so little.' ..Mathematics may be indispensable to physics, but it obviously does not constitute physics.
Physics is, hopefully, simple. Physicists are not.
Women are complex and subtle. Men are simple and direct.
Physics is the belief that a simple and consistent description of nature is possible.
Even before string theory, especially as physics developed in the 20th century, it turned out that the equations that really work in describing nature with the most generality and the greatest simplicity are very elegant and subtle.
What the string theorists do is arguably physics. It deals with the physical world. They're attempting to make a consistent theory that explains the interactions we see among particles and gravity as well. That's certainly physics, but it's a kind of physics that is not yet testable.
The physics are simple in theory, but in practice they are filled with the possibility for limitless error.
That attitude does not exist so much today, but in those days there was a very sharp distinction between basic physics and applied physics. Columbia did not deal with applied physics.
The works of 'abstract' art are subtle creations of order out of simple contrasting elements.
The integrity of the subtle body is totally important. As the subtle body wears, we get sick. That is why, eventually, the body dies - it's because something happens to the subtle body.
I started out with the intention of studying physics. I was a terrible high school student outside of the fact that I did well in physics, but there's a big difference between being good at physics and being a physicist, so I jettisoned that very quickly.
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