For me, being adopted is a picture of God's total sovereign control over all of the specific details he lovingly orchestrates in our lives. Over time, I have come to recognize a theme in my life of what I call ridiculous grace.
I'm talking about the times God intervenes in our lives in such flagrant, extreme ways. He interrupts the logical order of things, and turns everything upside down in the best way possible. He took me from being an unplanned pregnancy, to being a much-wanted "chosen child."
And there's the gospel—things were going along one way, but God intervened, and changed everything, because he's God and he's good and sovereign.
When God adopts us into his family, it's a picture of what Christ has done to come and save us and bring us to the Father. And when Christ, our elder brother, presents us to his Father he says, "Isn't she pretty, doesn't she look just like me?" The Father loves and accepts us because of what Christ has done on our behalf.
(From: The Ridiculous Grace of Adoption)