"Let the Law, sin, and the devil cry out against us until their outcry fills heaven and earth. The Spirit of God outcries them all. Our feeble groans, “Abba, Father,” will be heard of God sooner than the combined racket of hell, sin, and the Law." -- Luther on Galatians 4.
"We may now say to the Law: “Mister Law, you have lost your throne to Christ. I am free now and a son of God. You cannot curse me any more.” Do not permit the Law to lie in your conscience. Your conscience belongs to Christ. Let Christ be in it and not the Law. As the children of God we are the heirs of His eternal heaven. What a wonderful gift heaven is, man’s heart cannot conceive, much less describe." -- Luther on Galatians 4v7
"Paul seems to identify their defection from the Gospel to the Law with their former idolatry. Indeed he does. Whoever gives up the article of justification does not know the true God. It is one and the same thing whether a person reverts to the Law or to the worship of idols. When the article of justification is lost, nothing remains except error, hypocrisy, godlessness, and idolatry." -- Luther on Galatians 4v8-9