As per Proverbs 25: It is the glory of God to conceal a thing: but the honour of kings is to search out a matter. It's always bothered me why Noah and his family had to enter the ark seven days before the rain started. That period is definitely significant. I really don't think it points to a 7-day warning as some have surmised; we already have many warnings. I have some theories about this, but they're just theories. I don't want to muddy the water with unproven ideas. Maybe somebody here has something more concrete...