Now the promises were spoken to Abraham and to his descendant. ¹  Scripture ²  does not say, “and to the descendants,” ³  referring to many, but “and to your descendant,” ⁴  referring to one, who is Christ.

And if you belong to Christ, then you are Abraham’s descendants, ¹  heirs according to the promise.

Why then was the law given? ¹  It was added ²  because of transgressions, ³  until the arrival of the descendant ⁴  to whom the promise had been made. It was administered ⁵  through angels by an intermediary. ⁶ 

so then, understand ¹  that those who believe are the sons of Abraham. ²