One major aspect of the plot for a science fiction novel I'm working on is that the ancient Greek god Poseidon lives in the ocean of the planet Neptune (yes, Neptune has a liquid ocean between its gaseous atmosphere and solid core). I have an explanation - it goes something like this. There are two planes (three, but one is irrelevant for this explanation): the mental plane and the material plane (the physical universe). The material plane is more powerful than the mental plane, and if a being gains enough power in the material plane, it will manifest in the material plane. The Greek gods, although they were invented, were believed in absolutely by a large portion of the population, and their definition was quite specific and common among people. They achieved a ghostlike, partially manifested quasi-existence in the material plane because they were powerful in that many people believed in them, but not enough to fully manifest. But then, of course, people began to stop believing in them, and because they were conscious and sentient, they decided to save themselves from fading back to the mental plane by traveling throughout space and finding homes where they could flourish. Poseidon went to Neptune, because of its ocean, and because the planet was practically designed for him, he achieved full material existence. The planet was named after him later because he unwittingly transmitted energy across a lower plane to influence the astronomer who discovered the planet. Two questions: 1) Does this idea seem seem plausible - does it even make sense? 2) If so, does the whole idea seem contrived and over-the-top? EDIT: To clarify, this is not the plot, this is the principle underlying premise.