Answer:
I am the hole in the night, the ever watchful eye. I return in a cycle, to enlighten the sky.
What is a five-letter word that has brain in it?
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
What moves without seeing and cries without eyes?
How far will a blind dog walk into a forest?
You use it between your head and your toes, the more it works the thinner it grows.