Tell me, ye that desire to be under the law, do ye not hear the law? For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise. (Galatians 4:21-23, KJV)
God promised Abraham a chosen son. Ismael was his first born, but was not the chosen son. Ismael represents what is born of flesh rather than what God have promised and spoken. God allowed Abraham to bring forth Ismael by way of going into his wife’s handmaiden (Hagar) because God had a purpose for Ismael to be born to show us what is the perfection of faith and what is not the perfection of faith. The perfection of faith is doing exactly what God have told us to do without adding or taking way anything from what God have spoken. We should live by every word that is spoken by God. The perfection of the faith came when God made it clear that the chosen one (Isaac) was to come out of Sara’s womb and from Abraham’s loins. We should make sure that we focus on what God have said instead of coming up with our own interpretation and reasoning. Only God can give us perfect faith.
And when Abram was ninety years old and nine, the Lord appeared to Abram, and said unto him, I am the Almighty God; walk before me, and be thou perfect. (Genesis 17:1, KJV)
God also perfected faith in Abraham by making a token of the covenant of circumcision and changing the names of Abraham and Sarah. The covenant of circumcision that God made between Himself and Abraham speaks from a spiritual standpoint that we should cut away the deeds, thoughts, and opinions of the flesh when it comes to doing God’s will. We should make sure that we are walking with the Lord in perfect obedience to the faith that He has given us through Jesus and Holy Spirit.