2 Peter 2:5 says “and if God did not spare the ancient world, but preserved Noah, a preacher of righteousness, with seven others, when He brought a flood upon the world of the ungodly; . . . verse 9 completes the thought . . . then the Lord knows how to rescue the godly from temptation, and to keep the unrighteous under punishment for the day of judgment.
All three certainties are affirmed in the flood:
God's Word about the pending flood came to Noah one hundred years before the flood came – the flood then came just as God said.
God rescued Noah from the water of the flood for sure, but God also rescued Noah from the temptations and from the lure of society.
God brought punishment and judgment upon a world that had gone its own way without regard for God- ungodly.
Understanding these things about Noah is not just a history lesson for us about what happened in the past. No. This is about God. This is about knowing God, who He is, what He is like. And this is about learning lessons. The point of the text is that we should recognize that what God has done in the past informs us about what we can expect in the future.