Answer:
It holds most knowledge that has ever been said. But is not the brain, is not the head. To feathers and their masters, it's both bane and boon One empty, and one full.
What can you fold but not crease?
This only turns over once you have traveled very far. What is it?
who do you think you know but sometimes you don't
You use it between your head and your toes, the more it works the thinner it grows.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.