Humans sleep. Some mammals hibernate. Insects rest. Fish enter trances. Microorganisms have periods of stasis.
In some sense, everything sleeps. And everything dreams.
Imagine the nightmares of being chased by predators, and the unseen things in the night. Imagine entire worlds made of bloodshed, wet raw meat and stinking carcasses.
Imagine what strange basic concepts a nucleus must generate, painting with long strokes the fears and hatreds which will last for aeons What would such a creature think -- if it could -- were it told its actions would lead to the birth of gods?
These dreams are out there, circling chaotically in a mass of screaming evil at the center of thought and feeling. One god that didn't need to be born, but opened the door for the rest.
Sleep lightly; your dreams have forsaken you since the dawn of time.