“To live is Christ” means we are the righteous who are alive by faith in Christ, and are now living out that faithfulness of Christ. No matter what.
“To live is Christ” means we now have the justice and righteousness that God requires imputed to us in spite of us.
As ungodly saints we pursue Christ. We trust Christ. We submit to Christ. We desire his life, his character, his love. His life becomes our law – the “law of Christ.” Not a law we must live up to, but a law that is alive in us. That’s “to live is Christ.”
“To live is Christ” is this daily process of knowing, considering, and presenting. Knowing you are dead to sin. Considering yourself dead to sin and alive to God in Jesus. And then presenting your actions to God as his own actions in the world.
“To live is Christ” is the constant realization that I never did earn it, I never will earn it, and I am not currently earning it. My sin is too massive. But praise God, his grace is more massive.
“To live is Christ” means we are justified by God’s grace. No more guilt (victimizers) and no more shame (victims). Christ’s imputed righteousness has made us whole.