Summary: David praises God with the sun and sky, whom he says show God's handiwork. God's craftsmanship is also evident in His Law, he says; David prays not only to be forgiven of sin he knows about, but also of sin he doesn't as well as guiding him away from sinning in the first place.
Response: I like this one! There are like five different feelings here, but I agree with them. God's creation is wonderful; His Law is the ideal way to live, though we can only fall short of it; I need God's hand to stay me away from sin; even when I do sin, I need His forgiveness; even when I sin and don't know it, I still need it. They flow pretty well, all from the majesty of the sky. Neat!