What I am saying is that as long as an heir is underage, he is no different from a slave, although he owns the whole estate. 2 The heir is subject to guardians and trustees until the time set by his father. 3 So also, when we were underage, we were in slavery under the elemental spiritual forces of the world. 4 But when the set time had fully come, God sent his Son, born of a woman, born under the law, 5 to redeem those under the law, that we might receive adoption to sonship.
That is an interesting take; the Law as regent, the guy who runs the kingdom while the prince is too young to become king. Of course, any Jews in the audience would have their cookies frosted, since they're seeing the faith they grew up with dissed as inferior child's play.
Note the end of verse five; the sonship is what I was riffing on yesterday, not quite remembering that this would come up in this chapter. Regardless of our gender, we're all sons of God, for it would have been the eldest son who inheritied the father's wealth.