What was a shadow, after all, but a shape in the moving world reduced to a projection of possibilities?

With respect to the requirement of art, the probable impossible is always preferable to the improbable possible.

One should not inquire too closely where ancient legends about the gods are concerned; many things which reason rejects acquire some color of probability once you bring a god into the story

Anything is possible, but not everything is probable.

Anything at all is possible. Some things are unlikely. Some things will never happen. But they always could, at any time.

A likely impossibility is always preferable to an unconvincing possibility. The story should never be made up of improbable incidents; there should be nothing of the sort in it.