Coming to the more specifically religious laws we find that Philo, missionary as he is, prohibits altogether marriage with Gentiles,[297] and that though, in the opinion of certain rabbinic teachers, the Biblical prohibition extended only to marriage with the Canaanite tribes, and unions with other Gentiles were permitted.[298] Philo recognizes how dangerous such unions are for the cause which he had so dearly at heart, the spreading of Judaism. "Even," says he, "if you yourself remain true to your religion through the influence of the excellent instruction of your parents, yet there is no small danger that your children by such a marriage may be beguiled away by bad customs to unlearn the true religion of the one only God."[299] Throughout, Philo is true to the mission of Israel in its highest sense. That mission is not assimilation, and it is to be brought about by no easy method of mixing with the surrounding people. It can be effected only by holding up the Torah in its purity as a light to the nations, and by offering them examples of life according to the law. Of the special ordinances for Sabbaths and festivals Philo mentions only those consecrated by the Biblical law or ancient tradition, which probably were the only ones settled in his day. He lays down the prohibition to kindle fire,[300] to make or return deposits, or to plead in the law courts on the Sabbath; he speaks of the reading of the Haggadah and Hallel on the night of Passover, of the bringing of a barley cake during the 'Omer and of the first fruits to the Temple on the Feast of Weeks, of the Shofar at New Year, and of the Sukkah, but not of the Lulab at Tabernacles. It should be remembered that the Halakah was not consolidated till the second or third century, and in Philo's time it was in the process of formation by different schools of rabbis. But the passage quoted in an earlier chapter, about adding to the law, proves his reverence for the oral law.[301]