Random thoughts on Energy

Energy, What is it? How does it work? Is it all them same, manifested in a myriad of ways?
How does one compare the energy of love with that of hate, with sitting still or rapid movement?
How does the energy of sexual build-up and the energy of release through orgasm differ?
Physical and mental energy, when expended, can produce a similar sense of fatigue.
Einstein states that E=mc2, energy is equal to mass times the constant squared (The constant being the speed of light in a vacuume) but does that help much here? These are just numbers after all. What about quantum physics?

How can one play with energy? I think we do it all the time, usually without knowing it and sometimes knowing full well the nuances and intricacies of such play.
What do kinnetic energy, atomic energy, speed, friction, and gravity have in common? Probably a whole lot.

A song can be sung that is beautiful and perfectly in tune but the energy behind it, that comes from the singers and, or instrumentalists, plays a significant role in how it translates to the listener. The energy exchange between a performer and the audience can make a huge difference in the dynamic of a performance.

O.K. I guess I'm done. Just got to thinking about this in an abstact way and wanted to capture the thread of my thoughts to play with some other time. It doesn't have to make sense.