The Apostle Paul
Galatians 4:8ESV·traditional attribution

Formerly, when you did not know God, you were enslaved to those that by nature are not gods.

John Calvin Reformed @genevareformer

8. But when ye as yet knew not God. This is not intended as an additional argument; and indeed he had already proved his point so fully, that no doubt remained, and the rebuke which was now to be administered could not be evaded. His object is to make their fall appear more criminal, by comparing it with past events.

Matthew Henry Presbyterian @wholebiblehenry

In these verses the apostle puts them in mind of what they were before their conversion to the faith of Christ, and what a blessed change their conversion had made upon them; and thence endeavours to convince them of their great weakness in hearkening to those who would bring them under the bondage of the law of Moses. I.

Commenting on Galatians 4:8-11

John Gill Reformed Baptist @doctorgill

Howbeit then, when ye know not God,.... Whilst in Gentilism, and in a state of unregeneracy, they had no true knowledge of God; though they might know by the light of nature, and works of creation, that there was a God, yet they did not know who he was, but called either mortal men, or some one or other of the creatures, or stocks, and...