15 Brothers, let me put this in human terms. Even a human covenant, once it is ratified, cannot be canceled or amended.
16 The promises were spoken to Abraham and to his seed. The Scripture does not say, “and to seeds,” meaning many, but “and to your seed,” meaning One, who is Christ.
17 What I mean is this: The law that came 430 years later does not revoke the covenant previously established by God, so as to nullify the promise.
18 For if the inheritance depends on the law, then it no longer depends on a promise; but God freely granted it to Abraham through a promise.
19 Why then was the law given? It was added because of transgressions, until the arrival of the seed to whom the promise referred. It was administered through angels by a mediator.
20 A mediator is unnecessary, however, for only one party; but God is one.
21 Is the law, then, opposed to the promises of God? Certainly not! For if a law had been given that could impart life, then righteousness would certainly have come from the law.
22 But the Scripture pronounces all things confined by sin, so that by faith in Jesus Christ the promise might be given to those who believe.
23 Before this faith came, we were held in custody under the law, locked up until faith should be revealed.
24 So the law became our guardian to lead us to Christ, that we might be justified by faith.
25 Now that faith has come, we are no longer under a guardian.