“Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods.”
King James Version (KJV)
4:8 Indeed then when ye knew not God, ye served them that by nature - That is, in reality. Are no gods - And so were under a far worse bondage than even that of the Jews. For they did serve the true God, though in a low, slavish manner.
Ga 4:8 Howbeit then. These Galatian brethren had been idolaters, and had worshiped idols which were not gods at all. At that time they knew not God, the true God, at all.