Envy and resentment are terribly corrosive passions. To suffer at the sight or even the thought of others' enjoyment of life makes one a committed enemy of human happiness. Such people end up being practically a curse upon the human race. They vandalize life, exerting themselves not in the pursuit of gain or pleasure, but to hinder others' enjoyment.
Wherever I go it will be well with me, for it was well with me here, not on account of the place, but of my judgments which I shall carry away with me, for no one can deprive me of these; on the contrary, they alone are my property, and cannot be taken away, and to possess them suffices me wherever I am or whatever I do.