"Envy always puts you at the center of your universe. It is all about what you have or don't have. It shrinks your world down to the Lilliputian size of your wants, your needs, and your feelings. The good life then becomes the life that you say is good for you and the bad life is bad because you say you are not getting what you want or need. In this system the world is evaluated solely on the basis of what you do or don't have. The problem is that life is not about you. You and I have been born into a world that by its very nature is a celebration of the glory of Another. I am not at the center of my world; God is. The fulfilling of my desires and needs is not the most important thing in the world; God's will is. Envy is angry because my kingdom doesn't seem to be coming and my will doesn't seem to be being done. Anytime you have you at the center of your world, you have a distorted perspective on what is."
Paul Tripp, Psalm 73: The distortion of envy (read the full thing here)