Noah in rabbinic literature "Sefer haYashar" describes another method for distinguishing them: the clean animals and fowls crouched before Noah, while the unclean ones remained standing. A difference of opinion concerning Noah prevails also with regard to his entering into the ark. According to some rabbis, Noah's faith was so small that he did not enter the ark until he stood ankle deep in water (Genesis Rabba xxxii. 9); others declare, on the contrary, that Noah waited for God's directions to enter the ark, just as he awaited His permission to leave it (ib. 34.4; Midrash Agadat Bereshit, in Jellinek, "B. H." iv. 11).
Noah later Christian thought, the Ark came to be compared to the Church: salvation was to be found only within Christ and his Lordship, as in Noah's time it had been found only within the Ark. St Augustine of Hippo (354–430), demonstrated in "The City of God" that the dimensions of the Ark corresponded to the dimensions of the human body, which corresponds to the body of Christ; the equation of Ark and Church is still found in the Anglican rite of baptism, which asks God, "who of thy great mercy didst save Noah," to receive into the Church the infant