The Universe is a transformative medium. The very nature of the natural world is transformation. There is no loss of energy - but it transforms.
Even I have transformed drastically. I was a very conservative, right-wing, Bible-thumping extremist. For a lot of years.
Now, I am a very liberal, atheistic/agnostic/Buddhist/Wiccan/Pagan/geek. I've gone from denouncing (for example) gays as a threat to the existence of the USA, to performing weddings for gay friends.
I believe that so much of what we see as mythology, old religions, sagas, and legends, are based on reality, and a lot of it falls under Quantum Physics.