Answer:
When I live I cry, If you don't kill me I'll die.
As light as a feather, but you can’t hold it for ten minutes.
My first is equality; my second is inferiority; my whole is superiority.
I am the outstretched fingers that seize and hold the wind. Wisdom flows from me in other hands. Upon me are sweet dreams dreamt, my merest touch brings laughter.
The weapon of choice to create the biggest shock.
I stay where I am when I go off. What am I?