Answer:
I am in truth a yellow fork from tables in the sky by inadvertent fingers dropped the awful cutlery. Of mansions never quite disclosed and never quite concealed the apparatus of the dark to ignorance revealed.
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
I keep growing and am practically indestructible. I get eaten, but always come back. I survive cold and lie everywhere. You see me everyday. What am I?
What has 4 fingers and a thumb but isn't alive?
I am in the past, never in the future. I don't exist, but have existed. I saw what you saw, and this is what I will ever see. What am I?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.