God told Noah to prepare an ark for the saving of His house; and by this act he condemned the world and became heir of the righteousness which is by faith. God could have directed him and his family to proceed to some secret mountain peak, and sustained them there... and then controlled the floodwaters so that they would not reach such heights. But instead He gives direction for the preparation of an ark, confounding the wise men of his age, and confounding the wise men of every age since then who continue to scoff at this story as a mere fairy tale.
Scientifically it would seem just impossible to house so many animals, and to store enough food to sustain them for so long a time. Of course they do not realize that God may well have performed ten thousand miracles to accomplish this task. One armful of hay could have fed every grass-eating animal on that boat for a whole year. One jar of grain could have fed Noah and all his family for a year, or ten years if need be. But God tells us nothing of all this, one way or the other. Men of faith continue to believe the story; for they know that the God who preserved Noah and his family was the God of our Lord Jesus Christ, who fed the five thousand with a mere handful of bread and fish; and who taught us, by word and deed, that His God is our God, and the God of the impossible.