1. The Jews are wont to glory in this Psalm which we have sung, saying, “Known in Judæa is God, in Israel great is the name of Him:” and to revile the Gentiles to whom God is not known, and to say that to themselves alone God is known; seeing that the Prophet saith, “Known in Judæa is God.” In other places therefore He is unknown. But God is known in very deed in Judæa, if they understand what is Judæa. For indeed God is not known except in Judæa. Behold even we say this, that except a person shall have been in Judæa, known to him God cannot be. But what saith the Apostle? He that in secret is a Jew, he that is so in circumcision of the heart, not in letter but in spirit. There are therefore Jews in circumcision of the flesh, and there are Jews in circumcision of the heart. Many of our holy fathers had both the circumcision of the flesh, for a seal of the faith, and circumcision of the heart, for the faith itself. From these fathers these men degenerating, who now in the name do glory, and have lost their deeds; from these fathers, I say, degenerating, they have remained Jews in flesh, in heart Heathens. For these are Jews, who are out of Abraham, from whom Isaac was born, and out of him Jacob, and out of Jacob the twelve Patriarchs, and out of the twelve Patriarchs the whole people of the Jews. But they were generally called Jews for this reason, that Judah was one of the twelve sons of Jacob, a Patriarch among the twelve, and from his stock the Royalty came among the Jews. For all this people after the number of the twelve sons of Jacob, had twelve tribes. What we call tribes are as it were distinct houses and congregations of people. That people, I say, had twelve tribes, out of which twelve tribes one tribe was Judah, out of which were the kings; and there was another tribe, Levi, out of which were the priests. But because to the priests serving the temple no land was allotted, but it was necessary that among twelve tribes all the Land of promise should be shared: there having been therefore taken out one tribe of higher dignity, the tribe of Levi, which was of the priests, there would have remained eleven, unless by the adoption of the two sons of Joseph the number twelve were completed.