Tonight we will be studying the doctrine of adoption, as found in the Westminster Shorter Catechism.

Q. 34. What is adoption?
A. Adoption is an act of God’s free grace, whereby we are received into the number, and have a right to all the privileges of, the sons of God.

We also find a summary in the Westminster Confession of Faith:

CHAPTER 12
Of Adoption

1. All those that are justified, God vouchsafeth, in and for his only Son Jesus Christ, to make partakers of the grace of adoption, by which they are taken into the number, and enjoy the liberties and privileges of the children of God, have his name put upon them, receive the Spirit of adoption, have access to the throne of grace with boldness, are enabled to cry, Abba, Father, are pitied, protected, provided for, and chastened by him, as by a father: yet never cast off, but sealed to the day of redemption; and inherit the promises, as heirs of everlasting salvation.