The Apostle Paul
Galatians 4:6ESV·traditional attribution

And because you are sons, God has sent the Spirit of his Son into our hearts, crying, “Abba! Father!”

John Calvin Reformed @genevareformer

6. And because ye are sons. The adoption which he had mentioned, is proved to belong to the Galatians by the following argument. This adoption must have preceded the testimony of adoption given by the Holy Spirit; but the effect is the sign of the cause.

Matthew Henry Presbyterian @wholebiblehenry

In this chapter the apostle deals plainly with those who hearkened to the judaizing teachers, who cried up the law of Moses in competition with the gospel of Christ, and endeavored to bring them under the bondage of it. To convince them of their folly, and to rectify their mistake herein, in these verses he prosecutes the comparison of a child under age, which he...

Commenting on Galatians 4:1-7

John Gill Reformed Baptist @doctorgill

And because ye are sons,.... That is of God, so some copies read; and the Ethiopic version, "inasmuch as ye are his sons"; not in so high a sense as Christ is the Son of God; nor in so low a sense as all men are his offspring; nor in such sense as magistrates are the children of the most High; nor merely on account...