Among the outward means by which the religion of Israel was preserved, one of the most important was the centralisation and localisation of its worship in Jerusalem. If to some the ordinances of the Old Testament may in this respect seem narrow and exclusive, it is at least doubtful, whether without such a provision Monothsiem itself could have continued as a creed or a worship. In view of the state of the ancient world, and of the tendencies of Israel during the earlier stages of their history, the strictest isolation was necessary in order to preserve the religion of the Old Testament from that mixture with foreign elements which would speedily have proved fatal to its existence. And if one source of that danger had ceased after the seventy years' exile in babylonia, the dispersion of the greater part of the nation among those manners and civilisation would necessarily influence them, rendered the continuance of this separation of as great importance as before. In this respect, even traditionalism had its mission and use, as a hedge around the Law to render its infringement or modification impossible.

Wherever a Roman, a Greek, or an Asiatic might wander, he could take his gods with him, or find rites kindred to his own. It was far otherwise with the Jew. He had only one Temple, that in Jerusalem; only one God, Him Who had once throned there between the Cherubim, and Who was still King over Zion. That Temple was the only place where a God-appointed, pure priesthood could offer acceptable sacrifices, whether for forgiveness of sin, or for fellowship with God.