There is a fable that Satan’s agents were failing in their various attempts to draw into sin a holy man who lived as a hermit in the desert of northern Africa. Every attempt had met with failure; so Satan, angered with the incompetence of his subordinates, became personally involved in the case. He said, “The reason you have failed is that your methods are too crude for one such as this. Watch this.”
He then approached the holy man with great care and whispered softly in his ear, “Your brother has just been made Bishop of Alexandria.” Instantly the holy man’s face showed that Satan had been successful: a great scowl formed over his mouth and his eyes tightened up.
“Envy,” said Satan, “is often our best weapon against those who seek holiness.
Michael Green, Illustrations For Biblical Preaching, Baker 1993, p. 121.