If there is one word that stands out in today's readings, it is "covenant." God's faithfulness and goodness serve as examples to us of how to live. Genesis tells the story of Noah and of God's covenant not only with all people, but with all of nature. Never will the cleansing waters of the flood bring their destructive power to all the earth again. The sign, the reminder to both God and nature, is the rainbow in the heavens.
The psalm reminds us of this compassion of God, and begs God to remember us, not because of our goodness, but because of God's goodness and fidelity to the promise. God shows us how to be good, not by decree, but by example.