(32) Why does he say, “In the tenth month, on the first day of the month, the heads of the mountains appeared?” (#Ge 8:4). As in numerals the number ten is the extreme bound of the units, being a definitive and perfect number, so too it is the cycle and end of the units, and also the beginning and cycle of the decades, and of infinity of numbers; thus the Creator, on the cessation of the deluge, condescended that the tops of the mountains should appear in the number of the decade, being a definitive and perfect number.