In this part three of the teaching series on the Kingdom of God by Pastor Eric Michael Teitelman at House of David Ministries, the focus is on the concept of the spirit of adoption as the key promise God made to Israel. Drawing from Romans 9, Pastor Eric explains that this promise encompasses various aspects of God's covenant relationship with Israel, including adoption, glory, covenants, law, service, and promises. He emphasizes the significance of the spirit of adoption in restoring humanity's relationship with God, highlighting passages from Romans 8 and 2 Corinthians 5. The teaching underscores the unity of believers in Christ, irrespective of their backgrounds, and emphasizes the need for all nations to be grafted into Israel to partake in God's promises. The session concludes with a question about how the nations can share in Israel's promises, leaving the audience intrigued for the next part of the series.