In Gaiman’s Brief Lives, Ishtar (one of the many historical deities to make an appearance) describes the nature of gods in his legendarium:
“I know how gods begin, Roger. We start as dreams. Then we walk out of dreams into the land. We are worshipped and loved, and we take power to ourselves. And than one day there’s no one left to worship us. And in the end each little god and goddess takes its last journey back into dreams … and what comes after, not even we know.
“I’m going to dance now. I’m afraid.”
[NB. Assignation of this image to Ishtar is circumstantial.]