This is a symbol of baptism, which now saves you-- not the putting away of the filth of the flesh, but the answer of a good conscience toward God, through the resurrection of Jesus Christ,
(2) Noah (and family) were borne through the flood for a period of nine months; and as Macknight noted, "Noah's coming forth from the water to live again on the earth, after having been full nine months in the water, might fitly be called his being born of water."[36] Christians too must be "born of water" (John 3:5).