This is the final episode on the Sermon on the Mount. Jesus discusses various topics, including harsh judgments, the power of asking, the narrow way, false prophets, and why to follow Jesus' teachings. 

The Sermon on the Mount is Jesus' foremost teaching to His disciples, stressing the life He calls us to live and how to meet life's various challenges. This is not Jesus' only discourse, and to gather a full understanding of what He taught, we need to read all of the em. Many commentators call the Sermon on the Mount Jesus' "most important teaching," but that is typically their bias toward the ethical teachings of Jesus and away from His commands about who and what to believe.

John, for example, has many discourses, quite a few of them focused on believing IN Jesus as the Lord.