Commentaries
5:1,2 None will find happiness in this world or the next, who do not seek it from Christ by the rule of his word. He taught them what was the evil they should abhor, and what the good they should seek and abound in.
2. And he opened his mouth—a solemn way of arousing the reader's attention, and preparing him for something weighty. (Job 9:1; Ac 8:35; 10:34).
and taught them, saying—as follows.