Jealousy - I want what you have
Envy - I want what you have but I don't think I can ever have it, so I don't want you to have it.
WOW! That just about sums it up! The mentality of envy goes something like this:
I don't think I can win, so I want you to lose.
He even talked about the "Spirit of Eeyore" that is so prevalent in our society today. Listen to the mp3 clip here.