Check out this article at Family Ministry Today about the family in the New Testament and early church history by Pastor Rob Plummer. Even though it is not the main point of this article, Rob finds a way to talk about how the gospel must be more central in our thinking than our families. As a Family pastor, I'm so thankful for this emphasis. It must be a focus on the gospel first that informs and transforms our thinking about family ministry.
Biological and adoptive family relations, while vitally important in this life, are not eternal. Jesus made it clear that, in the new heavens and earth, marriages will no longer mark our existence; all believers will be “like the angels in heaven” (Matt. 22:30). If our children stand beside us in eternity, it will not be as our children but as our blood-redeemed brothers and sisters (Rev. 7:9-12). Even as parents rightly pour out their lives in caring for their children, they must realize that what matters eternally is that their children know and love the Lord. The category of biological lineage or legal progeny will fade into insignificance at the dawning of eternity (Matt. 3:9).
Even in this life, foundational family loyalties must pale in comparison to our ultimate loyalty to the triune God. Jesus said, “If anyone comes to me and does not hate his own father and mother and wife and children and brothers and sisters, yes, and even his own life, he cannot be my disciple” (Luke 14:26). This does not absolve believing parents of their responsibility to train their children in the fear of God; it does mean that every aspect of parenting is to be undertaken in light of a greater allegiance to the glory of God.