You can feel anything. All is free for you to feel. But I guarantee you that if you allow yourself to feel envy and then to swim in it, that envy will destroy you and the people around you. Envy is unlike anger. Envy is not a right wing nor a left wing, it is not on either end of the balancing beam. Nobody needs it and I can assure you that once you give yourself to it, you will be eaten up. Envy can even eat up nations, casting them up against each other and pull a whole nation down into an internal collapse.