19 Then you will say, “The branches were broken off so that I could be grafted in.” 20 Granted! They were broken off because of their unbelief, but you stand by faith. Do not be arrogant, but fear! 21 For if God did not spare the natural branches, perhaps he will not spare you. 22 Notice therefore the kindness and harshness of God—harshness toward those who have fallen, but God’s kindness toward you, provided you continue in his kindness; otherwise you also will be cut off. 23 And even they—if they do not continue in their unbelief—will be grafted in, for God is able to graft them in again. 24 For if you were cut off from what is by nature a wild olive tree, and grafted, contrary to nature, into a cultivated olive tree, how much more will these natural branches be grafted back into their own olive tree?

And if you would say: It is when they do not have faithfulness that they are called sons, as stated, but when they worship idols they are not called sons anymore; therefore, come and hear: And the verse states: “A seed of evildoers, sons who deal corruptly,” which alludes to the corruption of idol worship. And if you would say that although they are called “sons who deal corruptly,” they are no longer called full-fledged sons of God once they have sinned, come and hear: And the verse states: “And it shall come to pass that, instead of what was said to them: You are not My people, it shall be said to them: Sons of the living God.” This verse indicates that when the Jews repent they are again called full-fledged sons of God.