Most readers with even a passing interest in apologetics are familiar with St Paul's words from Romans 4:3-5,
For what does the Scripture say? "Abraham believed God, and it was counted to him as righteousness." Now to the one who works, his wages are not counted as a gift but as his due. And to the one who does not work but believes in him who justifies the ungodly, his faith is counted as righteousnessThis passage is critical to the doctrine of Sola Fide because it is where Protestants claim St Paul expressly lays down the doctrine of the 'Imputation of Christ's Righteousness' to the believer at the (one and only) moment of Justification, and that this Righteousness is received by faith. The standard and historic Protestant interpretation of "faith is counted as righteousness" is clearly stated in the Westminster Confession (XI:1):
Those whom God effectually calls, He also freely justifies; not by infusing righteousness into them, but by pardoning their sins, and by accounting and accepting their persons as righteous; not for any thing wrought in them, or done by them, but for Christ's sake alone; nor by imputing faith itself, the act of believing, or any other evangelical obedience to them, as their righteousness; but by imputing the obedience and satisfaction of Christ unto them, they receiving and resting on Him and His righteousness by faith; which faith they have not of themselves, it is the gift of God.What this passage is saying is that the phrase "faith counted as righteousness" is not to be understood as 'faith itself is counted as righteousness,' but rather, 'faith receives Christ's Righteousness.' What this article will demonstrate is effectively a silver bullet right to the heart of this heresy.