When you become an instrument in God's hands as He transfers someone from the realm of darkness into the kingdom of His Son, you make a difference in the person's eternal destiny. Not only that, but Satan also receives a devastating blow. ↗
He who busies himself with things other than improvement of his own self becomes perplexed in darkness and entangled in ruin. His evil spirits immerse him deep in vices and make his bad actions seem handsome. ↗