Answer:
I crawl on the earth. And rise on a pillar.
What is it that given one, you’ll have either two or none?
You use a knife to slice my head. And weep beside me when I am dead.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
What language does a billboard speak?