838. Let everyone beware of the heresy therefore that a person is justified by faith apart from works of the Law. For someone caught up in the heresy, who does not fully turn away from it before the end of his life draws near, is after death associated with demons of hell. Indeed, they are the goats of which the Lord says,

Depart from Me, you cursed, into the everlasting fire prepared for the devil and his angels. (Matthew 25:41)

For the Lord does not say of the goats there that they did evil things, but that they did not do good ones. And they did not do good ones because they say to themselves, "I cannot do good of myself. The Law does not condemn me. The blood of Christ purifies me and liberates me. His suffering of the cross has taken away the guilt of sin. Christ's merit is imputed to me through faith. I am reconciled to the Father, in a state of grace. He looks upon me as His child, and He regards our sins as frailties, which He instantly forgives for the sake of His Son. Thus He justifies us through faith alone, and no mortal could be saved if it were not the sole means of salvation. For what other end did the Son of God suffer the cross and fulfill the Law except to take away the condemnation due our transgressions?"

These and many more like them are the things they say to themselves, and so they do not do goods that are good. For their faith alone, which is nothing but a theoretical one, being in itself a faith they are taught and consisting therefore only of knowledge, does not produce any good works. Indeed, it is a lifeless faith, into which no life or soul enters unless the person turns directly to the Lord and refrains from evils as being sins, and this as though of himself. The good things that the person does then as though of himself are from the Lord, and are thus in themselves good.

On this theme we find the following in Isaiah:

Woe to a sinful nation... laden with iniquity, the offspring of evildoers, corrupted children! ...When you spread out your hands, I hide My eyes from you; even if you make many prayers, I will not hear... Wash yourselves, make yourselves clean; put away the evil of your doings from before My eyes. Cease to do evil, learn to do good... (Then) if your sins be like scarlet, they shall be as white as snow; if they be red like crimson, they shall be as wool. (Isaiah 1:4, 15-18)

And in Jeremiah:

Stand at the gate of the house of Jehovah, and proclaim there this word..., "Do not trust in the words of a lie, saying, 'The temple of Jehovah, the temple of Jehovah, the temple of Jehovah are these (the church of God, the church of God, the church of God is where our faith is).' ...Will you go stealing, murdering, committing adultery, and swearing falsely..., and then come and stand before Me in this house on which My name is placed and say, 'We are rescued,' while you do these abominations? Has this house... become a den of thieves...? 'Behold, I, even I, have seen,' says Jehovah. (Jeremiah 7:2-4, 9-11)