"Let me put it like this: the man who is truly blessed is the man whose sin is forgiven as debt, whose sin is covered up so that God will never look at it again. He is one to whom it is never going to be imputed as a crime. There is the negative aspect. But it goes beyond that; he is also one to whom God reckons this righteousness of Jesus Christ. That is the doctrine of justification by faith. Here are we - all of us sinners in the sight of God. What does this doctrine tell me?
It tells me that as I stand there on trial my debt is cancelled, my sin is covered. God has cast my sin behind His back. He will never look at it again. He will never see it again. It is blotted out - out of His sight for all eternity. And I shall never be charged with it as a crime. I am completely delivered from it. But over and above that God puts this to my account and reckons to me, this righteousness of Jesus Christ His Son".
Dr Martyn Lloyd-Jones - "Romans 3:20 - 4:25: Atonement and Justification" - Banner of Truth Trust, Edinburgh (1971) - (p176).