'Religions' in the Bible

Phrygia and Pamphylia, Egypt and the districts of Libya around Cyrene, and the visitors from Rome, both Jews and proselytes (Gentile converts to Judaism),

Now, however, since you have come to know [the true] God [through personal experience], or rather to be known by God, how is it that you are turning back again to the weak and worthless elemental principles [of religions and philosophies], to which you want to be enslaved all over again?