There are those today who call themselves Christians and see little or no difference between the child of God and the child of the devil (John 8:44, 47); believing that all people reflect God in their lives. The Holy God is reduced to common and ordinary, made in our likeness and image.
I was part of a denomination which went so far in its “Church Revitalization” program to require its pastors to invite unsaved people from the church neighborhood to critique and suggest ways of making the church services more acceptable. The heathen shaping the church worship services: it’s akin to having a blind man scrutinize the Mona Lisa or entrusting the children’s Sunday School to an atheist.
In Ephesians 2, Paul listed some of the grim conditions of the unsaved person but also the benefits of being in Christ. Remember that you … were without Christ, being aliens from the commonwealth of Israel, strangers from the covenants of promise, having no hope and without God in the world. But now in Christ Jesus you who were once were far off have been brought near by the blood of Christ …. Now, therefore, you are no longer strangers and foreigners, but fellow citizens with the saints and members of the household of God (Ephesians 2:11-13, 19).
Rejoice! Child of God. There is a difference because of Jesus.