Envy

Envy is a by-product of the ego, which feels diminished if something good happens
to someone else, or someone has more, knows more, or can do more than you. The
ego’s identity depends on comparison and feeds on more. It will grasp at anything.
If all else fails, you can strengthen your fictitious sense of self through seeing
yourself as more unfairly treated by life or more ill than someone else. What are the
stories, the fictions from which you derive your sense of self?

~Eckhart Tolle
Stillness Speaks