For if the inheritance comes about through the Law, it no longer comes about through the promise. But it was through a promise that God so graciously gave it to Abraham.

For the one who worked through Peter by making him an apostle to the circumcised also worked through me by sending me to the gentiles.

This happened in order that the blessing promised to Abraham would come to the gentiles through the Messiah Jesus, so that we might receive the promised Spirit through faith.

Now the slave woman's son was conceived through human means, while the free woman's son was conceived through divine promise.