‘Well, then, sinner,’ says the law of God, ‘have you paid the penalty which I pronounced upon disobedience?’
‘No,’ says the sinner, ‘I have not paid the penalty myself; but Christ has paid it for me. He was my representative when He died there on the cross. Hence, so far as the penalty is concerned, I am clear.’
‘Well, then, sinner,’ says the law of God, ‘how about the conditions which God has pronounced for the attainment of assured blessedness? Have you stood the test? Have you merited eternal life by perfect obedience during the period of probation?’
‘No,’ says the sinner, ‘I have not merited eternal life by my own perfect obedience. God knows and my own conscience knows that even after I became a Christian I have sinned in thought, word and deed. But although I have not merited eternal life by any obedience of my own, Christ has merited it for me by His perfect obedience. He was not for Himself subject to the law. No obedience was required of Him for Himself, since He was Lord of all. That obedience, then, which He rendered to the law when He was on earth was rendered by Him as my representative. I have no righteousness of my own, but clad in Christ’s perfect righteousness, imputed to me and received by faith alone, I can glory in the fact that so far as I am concerned the probation has been kept and as God is true there awaits me the glorious reward which Christ thus earned for me.’
Such, put in bald, simple form, is the dialogue between every Christian and the law of God. How gloriously complete is the salvation wrought for us by Christ! Christ paid the penalty, and He merited the reward. Those are the two great things that He has done for us.
The Doctrine of the Atonement, J. Gresham Machen