Answer:
I can fly but I have no wings. I can cry but I have no eyes. Wherever I go darkness follows me.
No legs have I to dance, no lungs have I to breathe. No life have I to live or die, and yet I do all three. What am I?
I am used to bat with, yet I never get a hit. I am near a ball, yet never thrown. What am I?
I am heavy forward but backward I'm not.
Adored by few, feared and hated by many. Mistress of the entire universal reason, master in the art of numbers. Some may have solved many of my mysteries, but there are still many of them to find. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.