Learn to understand the constitution of your Christian righteousness. Faith is weak, but it means enough to God that He will not lay sin to our charge. He will not punish nor condemn us for it. He will forgive our sins as though they amount to nothing at all. He will do it not because we are worthy of such mercy. He will do it for Jesus' sake in whom we believe.
Paradoxically, a Christian is both right and wrong, holy and profane, an enemy of God and a child of God. These contradictions no person can harmonize who does not understand the true way of salvation. Under the papacy we were told to toil until the feeling of guilt had left us. But the authors of this deranged idea were frequently driven to despair in the hour of death. It would have happened to me, if Christ had not mercifully delivered me from this error.
We comfort the afflicted sinner in this manner: Brother, you can never be perfect in this life, but you can be holy. He will say: "How can I be holy when I feel my sins?" I answer: You feel sin? That is a good sign. To realize that one is ill is a step, and a very necessary step, toward recovery. "But how will I get rid of my sin?" he will ask. I answer: See the heavenly Physician, Christ, who heals the broken-hearted. Do not consult that Quackdoctor, Reason. Believe in Christ and your sins will be pardoned. His righteousness will become your righteousness, and your sins will become His sins.
On one occasion Jesus said to His disciples: "The Father loveth you." Why? Not because the disciples were Pharisees, or circumcised, or particularly attentive to the Law. Jesus said: "The Father loveth you, because ye have loved me, and have believed that I came out from God. It pleased you to know that the Father sent me into the world. And because you believed it the Father loves you." On another occasion Jesus called His disciples evil and commanded them to ask for forgiveness.
A Christian is beloved of God and a sinner. How can these two contradictions be harmonized: I am a sinner and deserve God's wrath and punishment, and yet the Father loves me? Christ alone can harmonize these contradictions. He is the Mediator.
Do you now see how faith justifies without works? Sin lingers in us, and God hates sin. A transfusion of righteousness therefore becomes vitally necessary. This transfusion of righteousness we obtain from Christ because we believe in Him.
VERSE 7. Know ye therefore that they which are of faith, the same are the children of Abraham.
This is the main point of Paul's argument against the Jews: The children of Abraham are those who believe and not those who are born of Abraham's flesh and blood. This point Paul drives home with all his might because the Jews attached saving value to the genealogical fact: "We are the seed and children of Abraham."
Let us begin with Abraham and learn how this friend of God was justified and saved. Not because he left his country, his relatives, his father's house; not because he was circumcised; not because he stood ready to sacrifice his own son Isaac in whom he had the promise of posterity. Abraham was justified because he believed. Paul's argumentation runs like this: "Since this is the unmistakable testimony of Holy Writ, why do you take your stand upon circumcision and the Law? Was not Abraham, your father, of whom you make so much, justified and saved without circumcision and the Law by faith alone?" Paul therefore concludes: "They which are of faith, the same are the children of Abraham."
Abraham was the father of the faithful. In order to be a child of the believing Abraham you must believe as he did. Otherwise you are merely the physical offspring of the procreating Abraham, i.e., you were conceived and born in sin unto wrath and condemnation.