If the benefits of this agreement depended on the law, then they would no longer depend on the promise. But God gave them to Abraham as a free gift through a promise.
And since we are his children, we’re going to inherit everything that Christ will also inherit. But we must share in his sufferings if we also want to share in his glory.
It’s the same with the promises that God made to Abraham and to his seed. Scripture doesn’t say, “and to your seeds.” That would mean many people. It says, “and to your seed.” That means one person—Christ.
All who rely on obeying the law are under a curse. It is written, “Cursed is everyone who doesn’t continue to do everything written in the Book of the Law.”