A man builds. A parasite asks 'Where is my share?'
A man creates. A parasite says, 'What will the neighbors think?'
A man invents. A parasite says, 'Watch out, or you might tread on the toes of God... '
Maybe an unhealthy, broken down person would find themselves in a situation doing something they normally wouldn't for a reward. Like an addict or someone who is desperate for their life or is paranoid and delusional.
You hem me in -- behind and before;
you have laid your hand upon me.
Such knowledge is too wonderful for me,
too lofty for me to attain.