Galatians 3:20

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.