Paul could have said here, “Who shall bring any charge against God’s elect?” and then answered, “No one! We are justified.” That’s true. But that is not what he said. His answer instead is, “God is the one who justifies.”
The emphasis is not on the act but on the Actor.
Why? Because in the world of courts and laws where this language comes from, the acquittal of our judge might be overturned by a higher one.
So what if a local judge acquits you when you are guilty, if a governor has the right to bring a charge against you? So what if a governor acquits you when you are guilty, if the emperor can bring a charge against you?
Above God, there are no higher courts. If God is the one who acquits you – declares you righteous in his sight – no one can appeal, no one can call for a mistrial, no one can look for other counts against you. God’s sentence is final and total.
So hear this, all who will believe on Jesus, and are united to Christ, and saved by grace: God is the one who justifies you. Not a human judge. Not a great prophet. Not even the Law of Moses. But God, the Creator of the world and Owner of all things and Ruler of all that is created: God is the one who justifies you.
If God is for us, no one can successfully be against us. If God gave his Son for us, he will give us everything that is good for us. If God is the one who justifies us, no charge against us can stand.