Jealousy shows in that when you want to compete even at the hint of somebody initiating something new.
Jealousy shows in that when in something you are already doing well and still cannot see the other person growing.
Jealousy shows in that when you try to become what somebody already is.
Jealousy shows in that when you try to copy somebody and then expect yourself beating in their own area of expertise.
Jealousy shows in that when somebody’s goodness irritates the hell out of you.
Jealousy shows in what you want to show, more than in what you want to be, though what you show is what you want to be.
Jealousy is having a high competitive streak against a particular person, despite that person not participating in it.