So far as the Jews are concerned, the great name is that of Philo in the 1st century. He took Greek metaphysical theories, and, by the allegorical method, interpreted them in accordance with the Jewish Revelation. He dealt with (a) human life as explained by the relative nature of Humanity to God, (b) the Divine nature and the existence of God, and, (c) the great Logos doctrine as the explanation of the relation between God and the material universe.