7:7And Noah went in, and his sons, and his wife, and his sons’ wives with him, into the ark, because of the waters of the flood.
7:8Of clean beasts, and of beasts that are not clean, and of fowls, and of every thing that creepeth upon the earth,
7:9There went in two and two unto Noah into the ark, the male and the female, as God had commanded Noah.
7:10And it came to pass after seven days, that the waters of the flood were upon the earth.
7:11In the six hundredth year of Noah’s life, in the second month, the seventeenth day of the month, the same day were all the fountains of the great deep broken up, and the windows of heaven were opened.
7:12And the rain was upon the earth forty days and forty nights.
7:13In the selfsame day entered Noah, and Shem, and Ham, and Japheth, the sons of Noah, and Noah’s wife, and the three wives of his sons with them, into the ark;
7:14They, and every beast after his kind, and all the cattle after their kind, and every creeping thing that creepeth upon the earth after his kind, and every fowl after his kind, every bird of every sort.
7:15And they went in unto Noah into the ark, two and two of all flesh, wherein is the breath of life.
7:16And they that went in, went in male and female of all flesh, as God had commanded him: and the LORD shut him in.
The instructions are remarkably interested in keeping water out and say nothing about choosing a course. Rooms, pitch on both sides, three decks, a door in the side: this is a place for living creatures to survive, not a vessel commissioned to discover somewhere. No sail or rudder appears in the specification. The ark has a purpose before it has a destination.
That purpose is built into the ordinary work. Noah must make compartments and seal timber. The announced judgment does not make craftsmanship irrelevant; it makes the joints matter. Even the measurements refuse the small, cheerful boat of familiar pictures. Three hundred cubits long, fifty wide, thirty high. Whatever precise cubit is assumed, the proportions belong to a substantial structure, six times as long as it is broad.
Hebrews 11:7 singles out this building as the work of faith: Noah prepared an ark in response to warning about things not seen as yet. The faith is not a feeling supplied between the lines. It has dimensions. Genesis 6:22 closes the instructions by saying that Noah did what God commanded. The extraordinary promise receives a thoroughly practical answer.