Answer:
Though desert men once called me God today men call me mad. For I wag my tail when I am angry. And growl when I am glad.
I have an eye, but I can't see. I usually have to work with something in my eye. What am I?
Flat as a leaf round as a ring. I have two eyes but can't see a thing.
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves every day. What am I?
I pass before the sun but make no shadow. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.