1 Faustus said: You ask why we do not believe Moses, when Christ says, "Moses wrote of me; and if you believed Moses, you would also believe me." I should be glad if not only Moses, but all prophets, Jew and Gentile, had written of Christ. It would be no hindrance, but a help to our faith, if we could cull testimonies from all hands agreeing in favor of our God. You could extract the prophecies of Christ out of the superstition which we should hate as much as ever.
I am quite willing to believe that Moses, though so much the opposite of Christ, may seem to have written of Him. No one but would gladly find a flower in every thorn, and food in every plant, and honey in every insect, although we would not feed on insects or on grass, nor wear thorns as a crown. No one but would wish pearls to be found in every deep, and gems in every land, and fruit on every tree. We may eat fish from the sea without drinking the water. We may take the useful, and reject what is hurtful.
And why may we not take the prophecies of Christ from a religion the rites of which we condemn as useless? This need not make us liable to be led into the bondage of the errors; for we do not hate the unclean spirits less because they confessed plainly and openly that Jesus was the Son of God. If any similar testimony is found in Moses, I will accept it. But I will not on this account be brought into subjection to his law, which to my mind is pure Paganism. There is no reason whatever for thinking that I can have any objections to receiving prophecies of Christ from every spirit.
Source: Reply to Faustus the Manichaean (New Advent)