Answer:
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
You can read it both ways, I wearΝΎ One way it's a number, reversed a snare.
It cannot be seen, cannot be felt, Cannot be heard, cannot be smelt. It lies behind stars and under hills And empty holes it fills. It comes first and follows after, Ends life, kills laughter.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
I am mother and father, but never birth or nurse. I'm rarely still, but I never wander.
What did the piece of wood say when he saw the screwdriver and screws approaching?