Full Title: Christ is the Ark of Our Salvation
In this passage, Peter zeroes in on the coming judgment that will come upon the earth. Much like the worldwide flood (recorded in Genesis 7), which Peter, just like Jesus conveyed as a similar model for the end times, God's grace is going to last so long before time is up, and judgment "rains down on the earth". God makes this judgment known because there is more judgment coming, so it is wise to be both in good standing and revitalized in spirit through Jesus Christ.