The truth is that there are many reasons we feel jealous–we are selfish, we love ourselves more than others, we have deluded ourselves into thinking that other people are happier than we are, simply because of material comforts, and we are not trusting in God’s perfect plan for our lives.
But perhaps the greatest reason for jealousy is a profound misunderstanding of the grace that has been extended to us in Christ. Not only has God given us infinitely more than we could ever deserve (think of the Parable of the Unmerciful Servant), but He has also given us more than we could ever need.
Our salvation is not one good among many. It is not some sort of starting point from which we can begin to live the good life. Salvation in Christ is the good life. It is all we will ever need for complete joy and satisfaction in whatever we do. To think that someone else has a better life than you, simply because they received some temporary success on earth that will quickly pass away, is to cheapen the depths of the riches of God’s grace. If we are jealous, then we don’t know what we have. We don’t understand just how rich we are.
If jealousy is something you find yourself struggling with, then fight it, and fight hard, because it can easily overtake you. Consider what this jealousy says about your relationship with God, and then ask Him to overwhelm you with the knowledge of His love and grace. Otherwise, jealousy will only draw you into the rat race that every other American runs. It is never-ending, and there is nothing to be gained by it. It only promises heartache and disappointment, as you continually find other people who have what you desire.
-from “She Worships”