To often the Christian life is portrayed as war between the old man and the new man. It is a sort of gospel schizophrenic. We do not deny that the Christian struggles with sin. But the reality of the gospel is that the old man has been put to death. What you are fighting against is the ghost of what remains. You war against the last echoes. Sometimes the power of sin seems so real that these echoes seem tangible—I have succumbed, we think. The reality is that the Christian has been crucified with Christ. The old man has been put to death. The new man has arisen having been created by God through Christ’s work and the life given Spirit whom Christ sends from on high.
We should not fret the ghosts of the old man. We must drive him out of the graveyard because in that graveyard is a resurrected man. There is new life.
Romans 6:6 6 We know that our old self was crucified with him in order that the body of sin might be brought to nothing, so that we would no longer be enslaved to sin.
Colossians 3:9-10 9 Do not lie to one another, seeing that you have put off the old self with its practices 10 and have put on the new self, which is being renewed in knowledge after the image of its creator.
Ephesians 4:21-24 21 assuming that you have heard about him and were taught in him, as the truth is in Jesus, 22 to put off your old self, which belongs to your former manner of life and is corrupt through deceitful desires, 23 and to be renewed in the spirit of your minds, 24 and to put on the new self, created after the likeness of God in true righteousness and holiness.