Why does the etheric body awaken spontaneously suddenly?

I happen to be very spiritual, very connected to God. I have self enlightenment as my highest goal, and all of my efforts have been toward expansion of my consciousness.

Now, I’ve never bothered with the astral body, but yesterday, after a nap – my etheric/astral body awakened and filled me with an electric buzzing. I just lay there, feeling how sounds affected the body.

I’d like to know what caused it to awaken suddenly?

In recent days I have been working on destroying my illusion of ego – is it possible it is because of this?