Galatians 4:6 But when the fullness of time had come, God sent forth his Son, born of woman, born under the law, to redeem those who were under the law, so that we might receive adoption as sons.
Christian, you have been chosen. Just as an adopted child is chosen by his parents, so too have you been chosen by God and given all the rights due one of His children. Women shouldn’t be put off by the masculine language here. It’s good that we’re all called “sons” of God, despite our gender, because the firstborn son in any first century family who would have been reading this letter written by Paul would have had an abundance of rights that the other children would not have had. We should all be pleased to be called sons of God.
He has adopted us into His family through His Son, Jesus Christ. Through Jesus’ life, death on the cross, and resurrection from the dead, God sent an invitation to us to be part of the family. When we respond, the adoption is final and we gain child status. The adopted children of God have rights to everything the firstborn has as co-heirs with Christ.(Romans 8:17)
Not everyone is a child of God, though He created everyone. Only those who belong to Him through faith in Jesus Christ are His adopted children. But if you are His, take comfort in the knowledge that He chose you to be part of His family. Even while you were still just a sinner, He chose you and called you to Himself. He loves you that much.