George P.V. posted:

Envy is a natural emotion urging you to strive to be more. It is the two-year-old child yearning and urging herself to reach that doorknob which her brother can reach. There is nothing wrong with that. There is nothing wrong with envy. It is a motivator. It is pure desire. It gives birth to greatness.

Jealousy, on the other hand, is a fear-driven emotion making one willing for the other to have less. It is an emotion often based in bitterness. It proceeds from anger and leads to anger. And it kills. Jealousy can kill. Anyone who's been in a jealous triangle knows that.

Jealousy kills, envy gives birth.

-From Conversations With God - An Uncommon Dialogue - Book 2 (P. 209-10)