The Flood
First, God is shown to be the Judge of the whole earth. In a word He made distinctions between the righteous and the unrighteous, the clean and the unclean. What was clean was for God.
A second motif is that God made provision for the recipients of His grace. Thus the warning is that those who claim to be grace-receivers should walk with God in righteousness, being separate from sinners.
A third motif had significance for Israel. As God judged the world in Noah’s day and brought Noah through the Flood, so He judged the wicked Egyptians and brought Israel through the waters of the Red Sea to worship and serve Him. Instructions for that worship were distinctly spelled out in Leviticus. It is not surprising that many terms used here (Gen. 6:9–8:22) also appear in Leviticus.
