Read Romans 8:12-39
"For whom He foreknew, He also predestined conformed to the image of His Son, that He might be the firstborn among many brethren." Romans 8:29
Jesus came to give us sonship. There was no familial relationship with the Father until the Son arrived on the scene, lived a holy and blameless life and then laid down that life for us all, making all who would believe, co-heirs with him (Romans 8:17), sons and daughters of the Most High God (2 Corinthians 6:18)
"For he chose us in him before the creation of the world to be holy and blameless in his sight. In love he predestined us for adoption to sonship through Jesus Christ, in accordance with his pleasure and will— to the praise of his glorious grace, which he has freely given us in the One he loves. In him we have redemption through his blood, the forgiveness of sins, in accordance with the riches of God’s grace that he lavished on us. With all wisdom and understanding, he made known to us the mystery of his will according to his good pleasure, which he purposed in Christ, to be put into effect when the times reach their fulfillment—to bring unity to all things in heaven and on earth under Christ." Ephesians 1:4-10
Because Christ came to earth, when we believe, we are grafted into his family and we are granted every spiritual blessing (Ephesians 1:3). Child of God, if your celebration meter is broken this Christmas, that right there should fix it. You were chosen by the God of the universe to live as part of his family, not under a curse (Galatians 3:13), but as joint heirs with his Son. So smile. Rejoice! And celebrate your family heritage this Christmas. Jesus came to give us sonship. There was no familial relationship with the Father until the Son arrived on the scene.
Are you living in sonship? We have this honor and a right as children of God, to boldly live as ones who know who their Father is. We are all sons of God through faith in Christ Jesus (Galatians 3:26), and we should live as such, bringing honor to him and not shrinking back as though in fear. We've been adopted into his family as sons and daughters, which means we have been chosen.