4. (a) How should the brothers strive to become fruitful with regard to accurate knowledge, and what are they promised? (b) How is the prophetic word made more sure, and why should it be heeded?
4 Making sure of the calling to the heavenly Kingdom (1:1-21).
Thus, the prophetic word is made more sure, and it should be heeded, for it is not by man’s will, “but men spoke from God as they were borne along by holy spirit.”—1:1, 2, 4, 14, 17, 21.