The Purpose of the Torah Laws

Rashi: There's only one source of Torah law and that's Moses. Nowhere else do you have a source of Torahlaw? You've been to a Brismila, you've been to circumcision. Your blessing does the father of the child say I'm inducting him into the covenant of Abraham our father. Why is he doing that? Because Moses said so. He's not doing it because Abraham did it. And I can do it because Abraham was committed to do it for his children. That's what the Torah is explaining. The purpose of the laws is how you should behave in the palace of the King. So Rashi says it somehow it's well for misread