Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods. When ye knew not God - Though it is evident, from the complexion of the whole of this epistle, that the great body of the Christians in the Churches of Galatia were converts from among the Jews or proselytes to Judaism; yet from this verse it appears that there were some who had been converted from heathenism; unless we suppose that the apostle here particularly addresses those who had been proselytes to Judaism and thence converted to Christianity; which appears to be most likely from the following verses.
Related Commentaries of Galatians 4:8
Galatians 4:8
8 Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods.