Noah was 'perfect in his generation'. Is God describing racial purity, as many have imagined? When we take away the bias, the meaning of the Hebrew becomes clear.
God and Noah worked side by side to deliver the remnant of humanity through the Flood, God supplying the sanctification and grace and Noah obeying in faith.
God's decision to destroy the earth and humankind by a flood was ultimately an act of great love, stopping mankind before his heart became incorrigible.
God is at work producing leadership in an organization that will follow Him, calling people into His family, carefully crafting it into a perfect organism.
Both the 'eternal security' and 'no works' doctrines are destroyed by the remarkable example of Noah, who performed extraordinary works based upon faith.
God begins His spiritual creation by grace because the wages of sin is death. Consequently, God's people will exercise humility and faith in yielding to Him.