Psalms 18:3

Having then this hope, let our souls be bound to Him who is faithful in His promises, and just in His judgments. He who has commanded us not to lie, shall much more Himself not lie; for nothing is impossible with God, except to lie. Let His faith therefore be stirred up again within us, and let us consider that all things are nigh unto Him. By the word of His might He established all things, and by His word He can overthrow them. “Who shall say unto Him, What hast thou done? or, Who shall resist the power of His strength?” When and as He pleases He will do all things, and none of the things determined by Him shall pass away. All things are open before Him, and nothing can be hidden from His counsel. “The heavens declare the glory of God, and the firmament showeth His handy-work. Day unto day uttereth speech, and night unto night showeth knowledge. …

To this I replied, “If I were to be quarrelsome and light-minded like you, Trypho, I would no longer continue to converse with you, since you are prepared not to understand what has been said, but only to return some captious answer; but now, since I fear the judgment of God, I do not state an untimely opinion concerning any one of your nation, as to whether or not some of them may be saved by the grace of the Lord of Sabaoth. Therefore, although you act wrongfully, I shall continue to reply to any proposition you shall bring forward, and to any contradiction which you make; and, in fact, I do the very same to all men of every nation, who wish to examine along with me, or make inquiry at me, regarding this subject. …

Barnabas, too, who in person preached the word along with the apostle in the ministry of the Gentiles, says, “I write to you most simply, that ye may understand.” Then below, exhibiting already a clearer trace of gnostic tradition, he says, “What says the other prophet Moses to them? Lo, thus saith the Lord God, Enter ye into the good land which the Lord God sware, the God of Abraham, and Isaac, and Jacob; and ye received for an inheritance that land, flowing with milk and honey.” What says knowledge? Learn, hope, it says, in Jesus, who is to be manifested to you in the flesh. For man is the suffering land; for from the face of the ground was the formation of Adam. What, then, does it say in reference to the good land, flowing with milk and honey? Blessed be our Lord, brethren, who has put into our hearts wisdom, and the understanding of His secrets. …

6. “He then, having received the morsel of bread, went immediately out: and it was night.” And he that went out was himself the night. “Therefore when” the night “was gone out, Jesus said, Now is the Son of man glorified.” The day therefore uttered speech unto the day, that is, Christ did so to His faithful disciples, that they might hear and love Him as His followers; and the night showed knowledge unto the night, that is, Judas did so to the unbelieving Jews, that they might come as His persecutors, and make Him their prisoner. But now, in considering these words of the Lord, which were addressed to the godly, before His arrest by the ungodly, special attention on the part of the hearer is required; and therefore it will be more becoming in the preacher, instead of hurriedly considering them now, to defer them till a future occasion.

3. “Day unto day uttereth word” ( ver. 2 ). To the spiritual the Spirit giveth out the fulness of the unchangeable Wisdom of God, the Word which in the beginning is God with God. “And night unto night announceth knowledge.” And to the fleshly, as to those afar off, the mortality of the flesh, by conveying faith, announceth future knowledge.

[4.] Let us also imitate him after our power. And why do I say, after our power? For he that wills may come even near unto him, and behold his valor, and imitate his heroism. For still he is doing this work, “casting down imaginations, and every high thing that is exalted against the knowledge of God.” And although many heretics have attempted to cut him in pieces; yet still, even though dismembered, he displayeth a mighty strength. For both Marcion and Manichæus use him indeed, but after cutting him in pieces; but still even so they are refuted by the several members. For even a hand only of this champion being found among them puts them utterly to the rout; and a foot only, left amongst others, pursues and prostrates them, in order that thou mayest learn the superabundance of his power, and that, although shorn of his limbs even, he is able to destroy all his adversaries. …

“Hence Paul himself, who was one of the perfect, says in another Epistle “We speak wisdom among them that are perfect.” This then is what is commanded, that those mystic and secret things, which are full of divine truth, should be spoken by each man to his neighbour, so that day unto day may utter speech and night to night shew knowledge, that is, that a man should show all those clear and lucid truths which he knows to those to whom the words can be worthily addressed: “Ye are the light of the world.” On the other hand, he should exhibit everything involved in darkness and wrapped up in the mist of symbols to others who are themselves nothing but mist and darkness, those of whom it is said “And there was darkness under his feet,” that is, of course, under the feet of God. …

But, says he, the record of Moses does not lie, and from it we learn that God spake. No! nor is great David of the number of those who lie, and he expressly says; “The heavens declare the glory of God, and the firmament showeth His handy work. Day unto day uttereth speech, and night unto night showeth knowledge;” and after saying that the heavens and the firmament declare, and that day and that night showeth knowledge and speech, he adds to what he has said, that “there is neither speech nor language, and that their voices are not heard.” Yet how can such declaring and showing forth be other than words, and how is it that no voice addresses itself to the ear? Is the prophet contradicting himself, or is he stating an impossibility, when he speaks of words without sound, and declaration without language, and announcement without voice? or, is there not rather the very perfection of truth i …

6. “Day,” it is said, “unto day uttereth speech.” Behold the true days, where no darkness of night intervenes. Behold the days full of life and eternal brightness, which uttered the word of God, not in speech which passes away, but in their inmost heart, by constancy in confession, and perseverance in their witness.

8. Nor let this seem at variance with the true faith: “Day unto day uttereth the word;” soul unto soul, life unto life, resurrection unto resurrection; “and night unto night showeth knowledge;” that is, flesh unto flesh, they, that is, whose passion has shown to all the true knowledge of the faith. Good are these nights, bright nights, not without stars: “For as star differeth from star in brightness, so too is the resurrection of the dead.”

15. Yesterday I handled the verse, “Day unto day uttereth speech,” as my ability enabled me; to-day holy Scripture seems to me not only to have prophesied in former times, but even at the present. For when I behold your holy celebration continued day and night, the oracles of the prophet’s song have declared that these days, yesterday and to-day, are the days of which it is most opportunely said: “Day unto day uttereth speech;” and these the nights of which it is most fittingly said that “Night unto night showeth knowledge.” For what else but the Word of God have you during these two days uttered with inmost affection, and have proved yourselves to have the knowledge of the faith.

This profitable observance, dearly beloved, is especially laid down for the fasts of the Church, which, in accordance with the Holy Spirit’s teaching, are so distributed over the whole year that the law of abstinence may be kept before us at all times. Accordingly we keep the spring fast in Lent, the summer fast at Whitsuntide, the autumn fast in the seventh month, and the winter fast in this which is the tenth month, knowing that there is nothing unconnected with the Divine commands, and that all the elements serve the Word of God to our instruction, so that from the very hinges on which the world turns, as if by four gospels we learn unceasingly what to preach and what to do. …