Argument Two: It is a sin that the God of heaven has often prohibited and severely condemned in the word, which abundantly declares his abhorrence of it. You have prohibition after prohibition, and threatening upon threatening in the word against it, “thou shalt not commit adultery” (Exodus 20:14). This was delivered upon Mount Sinai with the greatest solemnity and terror by the mouth of God himself. Turn to, and ponder the following Scriptures among many others, Proverbs 5:2-4; Acts 5:29; Romans 1:24 & 29; Romans 13:13; 1Corinthians 6:13-18; 2Corinthians 12:21; Galatians 5:29; Ephesians 5:3; Colossians 3:5; 1Thessalonians 4:2-5; Hebrews 12:16; Hebrews 13:4 (see our verse for today). All these, with many others, are the true sayings of God, by them you shall be tried in the last day. Now, consider how terrible it will be to have so many words of God, and such terrible ones too as most of those are, to be brought in and pleaded against your soul in that day! Mountains and hills may depart, but these words shall not depart, heaven and earth shall pass away, but not one tittle of the word shall pass away. Believe it, sinner, as sure as the heavens are over your head, and the earth under your feet, they shall one day take hold of you, though we poor worms who plead them with you, die and perish (Zechariah 1:5-6). The Lord tells us it shall not fall to the ground. Which is a borrowed speech from a dart that is flung with a weak hand, it goes not home to the mark, but falls to the ground by the way. None of these words shall so fall to the ground.
(Works of John Flavel, Volume 5)