Now I mean that the heir, as long as he is a minor, is no different from a slave, though he is the owner of everything.

So you are no longer a slave but a son, and if you are a son, then you are also an heir through God.

Now Hagar represents Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children.

But what does the scripture say? "Throw out the slave woman and her son, for the son of the slave woman will not share the inheritance with the son" of the free woman.