And we hold the prophetic word more confirmed, to which ye do well to attend, as to a lamp shining in a dark passage, until the day dawn, and the morning-star arise upon your hearts.

Above all, [you should realize] that no prophecy of Scripture originates from a person's own initiative [Note: This passage is discussing the source of Scripture, not the understanding of it].

as it were in all his epistles, where he takes notice of these things: in which there are some passages that are difficult to understand, which the illiterate, and unstable wrest, as they do the rest of the scriptures, to their own ruin.