But there’s a deeper purpose at work in this mess. The Bible’s main theme is God’s gracious plan to redeem needy sinners. It teaches us that what God wants most for us is that we 1) become aware of our sinfulness and 2) our powerlessness to save ourselves, as we 3) believe and love his Son and the gospel he preached, and 4) graciously love one another. And it turns out that the family is an ideal place for all of these to occur.

- https://www.desiringgod.org/articles/gods-mercy-in-messed-up-families