Answer:
What is it that no man ever yet did see, which never was, but always is to be?
A nut cracker up in a tree.
I'm not really more than holes tied to more holes. I'm strong as good steel, though not as stiff as a pole.
Has no feet, but travels far. Is literate, but not a scholar. Has no mouth, yet clearly speaks.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.
Boxers do this for a living and kids do it in the backseat for free