Answer:
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
A hill full, a hole full, yet you cannot catch a bowl full.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around
When it is alive we sing, when it is dead we clap our hands. What is it?
I have two hands but cannot clap
I'm the source of all emotion but I'm caged in a white prison.