God established the principle of sonship in the Godhead. The principle of sonship was first established in The Trinity. The trinity is in partnership. There is partnership between the Father and the Son and then the Son and the Spirit. Jesus said He can do nothing of Himself. The Lord Jesus while on earth was in partnership with the Father and the Spirit.
Psalms 2:7
I will declare the decree: the LORD hath said unto me, Thou art my Son; this day have I begotten thee.
We being believers also have a role to play in the fulfillment of preaching the gospel and expanding the kingdom of God on earth. One of the best things we can do as believers is to give devote our lives in order for the gospel to be spread across. After we are saved, we need to give our lives to Christ and that means accepting the Lordship of Jesus over our lives
Living our lives in alignment with God's word is not something we do once in a while, rather it is a practice. We are given the responsibility in God's house to partner His servant in whom we are being inculcated by the teachings and the true doctrine of Christ, just like our beloved brother Eli. Sonship is synonymous to partnership.