What does the Bible say about spiritual sonship?

In John 8:37-47, Jesus emphasizes the need for genuine love for Him as the mark of true sonship to God. He rebukes the Jews for their false confidence in their lineage from Abraham, asserting that true children of God will exhibit the deeds of their father Abraham, which includes believing in Christ. Spiritual sonship is not merely about physical descent or church membership but is rooted in a living faith that produces love for Christ and his teachings. As it states in Ephesians 6:24, 'Grace be with all those who love our Lord Jesus Christ in sincerity.' Thus, true believers will show evidence of their relationship with God through their love and obedience to Jesus.