It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong.
It is important to realize that in physics today, we have no knowledge of what energy is
For those who want some proof that physicists are human, the proof is in the idiocy of all the different units which they use for measuring energy.
There is enough energy in a single cubic meter of space to boil all the oceans in the world.
'Conservation' (the conservation law) means this ... that there is a number, which you can calculate, at one moment-and as nature undergoes its multitude of changes, this number doesn't change. That is, if you calculate again, this quantity, it'll be the same as it was before. An example is the conservation of energy: there's a quantity that you can calculate according to a certain rule, and it comes out the same answer after, no matter what happens, happens.
Energy is a very subtle concept. It is very, very difficult to get right.
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