Answer:
I make everyone blind. You can't see me but I will always come back for you. What am I?
I am not alive but I can die. What am I?
My first is in riddle but not in little. My second is in think but not in brink. My third is in thyme but not in time. My fourth is in mother but not in brother. My last is in time but no t in climb.
So simple, that I can only point. Yet I guide men all over the world.
I am whole but incomplete. I have no eyes, yet I see. My largest part is one fourth of what I once was. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.