The proclamation of the gospel is the proclamation of the forgiveness of sin, not a promise of the potential for forgiveness based on us and what we do.
One thing is certain: Jesus didn’t tell us to love our enemies while He won’t love His own. He has loved and so we love. He has forgiven and so we forgive. Thank God, grace doesn’t require an invitation. Instead, it rushes right into the place where it is needed simply because of love.