Romans 12:1 Our sacrifice is a response to the grace we received in the gospel.
2 Samuel 7:1-17 God's plans are higher than ours, and our desire to serve Him should always be according to His design.
James was the earthly half brother and a doubter of Jesus but he came to place his faith in the Son of God. In his introduction he self identifies as a "servant of the Lord Jesus." Do you agree with James about Jesus?