Catechisma

Q34. What is adoption?

Adoption is an act of God's free grace by which we are received into the number, and have a right to all the privileges, of the sons of God.

Scripture Proofs — King James Version

1

1 John 3:1

Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not.

2

John 1:12

But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name.

Romans 8:17

And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.