Galatians 3:23-25

Before the coming of this faith, we were held in custody under the law, locked up until the faith that was to come would be revealed. So the law was our guardian until Christ came that we might be justified by faith. Now that this faith has come, we are no longer under a guardian.

Before the coming of this faith, we were held in custody under the law 
Romans 11:32  For God has bound everyone over to disobedience so that he may have mercy on them all. 

locked up until the faith that was to come would be revealed 
Galatians 3:25  Now that this faith has come, we are no longer under a guardian.

So the law was our guardian until Christ came 
Galatians 3:19  Why, then, was the law given at all? It was added because of transgressions until the Seed to whom the promise referred had come. The law was given through angels and entrusted to a mediator.
Romans 10:4  Christ is the culmination of the law so that there may be righteousness for everyone who believes.
Romans 4:14-15  For if those who depend on the law are heirs, faith means nothing and the promise is worthless, because the law brings wrath. And where there is no law there is no transgression.

that we might be justified by faith 
Galatians 2:16  (We Jews) know that a person is not justified by the works of the law, but by faith in Jesus Christ. So we, too, have put our faith in Christ Jesus that we may be justified by faith in Christ and not by the works of the law, because by the works of the law no one will be justified.

Now that this faith has come, we are no longer under a guardian 
Romans 7:4  So, my brothers and sisters, you also died to the law through the body of Christ, that you might belong to another, to him who was raised from the dead, in order that we might bear fruit for God.

(parentheses are mine)

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