Explanation of רננו צדיקים, where we call upon the צדיקים to praise Hashem for both His השגחה in guiding the world to its ultimate שלמות as well as His השגחה פרטית over those who have faith in Him, a manifestation of the genuine relationship between the Jewish people and Hashem, a fitting climax for פסוקי דזמרא of שבת.