Answer:
I am the black child of a white father a wingless bird flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me even though there is no cause for grief and at once on my birth I am dissolved into air.
I get dirty when wiping things clean. What am I?
What is that you will break even when you name it?
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.
This guy crossed a road and everyone wants an explanation.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.