(Verse 17, 18.) I did not sit in the council of the jesters, and I boasted (or feared) from the face of your hand: I sat alone, for you filled me with bitterness ((Vulgate: threat)). Why has my pain become perpetual (or why do those who distress me, find comfort) and my incurable wound refuse to be healed (or my strong wound, from where shall I be cured)? It has become to me like the falsehood of unfaithful waters (or like water that deceives and lacks faith). The Hebrews believe that these things are said from the perspective of Jerusalem: that she alone sat, and is filled with bitterness, and her pain has become everlasting; and just as waters pass by, so the words of the Prophets, with which they promised themselves prosperity, have passed falsely. But it is better, if we understand these things to be said from the perspective of the Prophet, by the words of a holy man, who did not sit in the assembly or secret gathering of those who mock, because he feared the impending hand of God; or rather, boasted that he did not have fellowship with evil. Alone, he said, I was sitting, according to what is written: I did not sit with the council of vanity, and I will not enter with those who do evil. I hated the congregation of evildoers, and I will not sit with the wicked (Psalm 26: 4, 5). And in another place, I am solitary until I pass through. On your face, he said, your hands, I was sitting alone (Psalm 140: 10), while I fear you, while I always expect your impending hand. I did not want to sit in the council of jesters, but I swallowed my bitterness, so that I might prepare joy for myself in the future. I had no intervals of pain, but I was constantly weighed down by unceasing misery, expecting no remedies. Those who afflicted me prevailed, and my wound became severe. But in this I had consolation, that it was like deceitful water, passing away. Just as passing waters flow and seem to vanish, so too does every attack of my enemies pass by with your help. May the Lord grant that we do not sit in the council of the mockers, or with those who do not consider the future, nor yield to adversity, but always fear God's judgment and say with the Prophet: I sat alone because I am filled with bitterness. Therefore, let him rejoice in the present time, not in the advice of the wise, but in the secret and hidden amusement of the playful; let it be good for me to adhere to God, to place my hope in God, to be satisfied with reproaches, and to await the judgment of my judge: which when the end shall come, will show by its work that all sadness and bitterness has passed like flowing waters.
[AD 420] Jerome on Jeremiah 15:17-18