Jealousy is bad, envy is good. The strong man looks at the great strength of others, with great admiration. This motivates him.

However, the weak man sees the greater strength of others, and feels petty jealousy. He thinks that the stronger man is somehow “cheating“. Whereas in reality, the weak man sees his self esteem lower in witnessing the sight of someone else stronger.

Jealousy is thinking that somehow the gains of others takes away from your own gains, zero sum. Envy is when you look at someone else, and you aspire to become as strong as them. Once again, jealousy is bad, envy is good.