Watch ye. A short exhortation, but of great weight. He exhorts them to watch, in order that Satan may not oppress them, finding them off their guard. For as the warfare is incessant, the watching requires to be incessant too. Now watchfulness of spirit is this -- when, free and disentangled from earthly cares, we meditate on the things of God. For as the body is weighed down by surfeiting and drunkenness, (Luke 21:34,) so as to be fit for nothing, so the cares and lusts of the world, idleness or carelessness, are like a spiritual surfeiting that overpowers the mind. [1] The second thing is that they persevere in the faith, or that they hold fast the faith, so as to stand firm; because that is the foundation on which we rest. It is certain, however, that he points out the means of perseverance -- by resting upon God with a firm faith. In the third exhortation, which is much of the same nature, he stirs them up to manly fortitude. And, as we are naturally weak, he exhorts them fourthly to strengthen themselves, or gather strength. For where we render it be strong, Paul makes use of only one word, which is equivalent to strengthen yourselves.

Footnotes

1 - "Sont comme vne yurongnerie spirituelle, qui assopit et estourdit l'entendement;" -- "Are like a spiritual drunkenness, which makes the mind drowsy and stupid."

Watch ye - The exhortation in this and the following verse is given evidently in view of the special dangers and temptations which surrounded them. The word used here (Γρηγορεῖτε Grēgoreite) means, to keep awake, to be vigilant, etc.; and this may, perhaps, be a military metaphor derived from the duty of those who are stationed as sentinels to guard a camp, or to observe the motions of an enemy. The term is frequently used in the New Testament, and the duty frequently enjoined; Matthew 24:41-42; Matthew 25:13; Mark 13:35; Luke 21:36; Acts 20:31; 1-Thessalonians 5:6; 2-Timothy 4:5. The sense here is, that they were to watch, or be vigilant, against all the evils of which he had admonished them, the evils of dissension, or erroneous doctrines, of disorder, of false teachers, etc. They were to watch lest their souls should be ruined, and their salvation endangered; lest the enemies of the truth and of holiness should steal silently upon them, and surprise them. They were to watch with the same vigilance that is required of a sentinel who guards a camp, lest an enemy should come suddenly upon them, and surprise the camp when the army was locked in sleep.
Stand fast in the faith - Be firm in holding and defending the truths of the gospel. Do not yield to any foe, but maintain the truth, and adhere to your confidence in God and to the doctrines of the gospel with unwavering constancy; see the note at 1-Corinthians 15:1. Be firm in maintaining what you believe to be true, and in holding on to your personal confidence in God, notwithstanding all the arts, insinuations, and teachings of seducers and the friends of false doctrine.
Quit you like men - (ἀνδρίζεσθε andrizesthe, from ἀνήρ anēr, a man). The word occurs no where else in the New Testament. In the Septuagint it occurs in Joshua 1:6-7, Joshua 1:9,Joshua 1:18; 1-Chronicles 28:20; 2-Chronicles 32:7; Nehemiah 2:1; and in 18 other places. See Trommius' Concordance. It occurs also in the classic authors; see Xenophon, Oec. Nehemiah 5:4. It means, to render one manly or brave; to show oneself a man; that is, not to be a coward, or timid, or alarmed at enemies, but to be bold and brave. We have a similar phrase in common use: "Be a man," or "Show yourself a man;" that is, be not mean, or be not cowardly.
Be strong - Be firm, fixed, steadfast; compare Ephesians 6:10, "Be strong in the Lord, and in the power of his might."

Watch ye - You have many enemies; be continually on your guard; be always circumspect: -
1. Watch against evil;
2. Watch for opportunities to receive good;
3. Watch for opportunities to do good;
4. Watch over each other in love;
5. Watch, that none may draw you aside from the belief and unity of the Gospel.
Stand fast in the faith - Hold in conscientious credence what you have already received as the truth of God; for it is the Gospel by which ye shall be saved, and by which ye are now put into a state of salvation: see 1-Corinthians 15:1, 1-Corinthians 15:2.
Quit you like men - Be not like children tossed to and fro with every wind of doctrine; let your understanding receive the truth; let your judgment determine on the absolute necessity of retaining it; and give up life rather than give up the testimony of God.
Be strong - Put forth all the vigor and energy which God has given you in maintaining and propagating the truth, and your spiritual strength will increase by usage. The terms in this verse are all military: Watch ye, γρηγορειτε, watch, and be continually on your guard, lest you be surprised by your enemies; keep your scouts out, and all your sentinels at their posts, lest your enemies steal a march upon you. See that the place you are in be properly defended; and that each be alert to perform his duty.
Stand fast in the faith - Στηκετε εν τῃ πιστει· Keep in your ranks; do not be disorderly; be determined to keep your ranks unbroken; keep close together. On your unity your preservation depends; if the enemy succeed in breaking your ranks, and dividing one part of this sacred army from another, your rout will be inevitable.
Quit yourselves like men - Ανδριζεσθε· When you are attacked, do not flinch; maintain your ground; resist; press forward; strike home; keep compact; conquer.
Be strong - Κραταιουαθε. If one company or division be opposed by too great a force of the enemy, strengthen that division, and maintain your position; if an attack is to be made on any part or intrenchment of the foe, summon up all your courage, sustain each other; fear not, for fear will enervate you. Your cause is good; it is the faith, the religion of Jesus; he is your Captain in the field; and, should you even die in the contest, the victory is yours.

Watch ye,.... The apostle in the mean while, before he closes his epistle, thinks fit to give some proper and pertinent exhortations, which might be of general use to this church; and first exhorts them to watchfulness, not for the coming of Apollos, and a convenient season for that; but over themselves, over their hearts, thoughts, affections, words, actions, and their whole conversations; and over one another, that they go not into bad principles, and evil practices; and also against sin in general, every appearance, and the first motions of it, and particularly unbelief; and against Satan, and his temptations, who is an indefatigable enemy, and whose wiles, devices, and stratagems are many and cunning; and against the world, its charms and snares; and likewise against false teachers, who lie in wait to deceive, and therefore to be guarded against; many of which were among these Corinthians, and made this exhortation very necessary. It became them likewise to watch daily at wisdom's gates, to wait constantly upon God in the word and ordinances, and especially to watch unto prayer, and in it, and after it; to all which it is necessary that they should be awake, and not asleep, to which the wise as well as foolish virgins are subject; that they should be sober, and not be overcharged with surfeiting and drunkenness, and the cares of this life; and that they be in their proper station, on their watchtower, keeping a good lookout, and being ready armed, to attack an enemy when descried. Many are the reasons why the saints should be upon their watch and guard; as because they have many eyes upon them; the eyes of the omniscient God are upon them, who sees and takes notice of all their actions; the eyes of angels are upon them, and even in their solemn assemblies; the eyes of saints are upon them, though watching for their good; and the eyes of evil men for their halting; and the eyes of devils are upon them, waiting an opportunity to do them hurt and mischief, if possible. Moreover, unwatchfulness exposes to many evils, temptations, and snares; to which may be added, as an inducement to watchfulness, the uncertainty of Christ's coming either at death, or to judgment.
Stand fast in the faith: which is proper to those that are watchful; for men asleep cannot well stand. This exhortation may respect either standing in the grace of faith, in opposition to doubting and unbelief, and design a continuance in the exercise of it, notwithstanding all the corruptions of nature, and the various sins and infirmities of life, the frequent temptations of Satan, and the many afflictions and trials in the world, which may occasion diffidence and distrust; for standing in this grace, and in such a constant exercise of it, greatly glorifies God, is what is wellpleasing in his sight; and in this way saints have communion with God, peace and comfort in their souls, and much spiritual joy and pleasure: it is the grace by which they stand, and therefore should stand in it, and by which they overcome the world. Or else it may intend standing in the doctrine of faith, in opposition to a departure from it, or a giving up any part of it, or wavering about it; it becomes saints to be steadfast in it, and abide by it, whoever is against it; let them be ever so many, or ever so wise and learned, and whatever may be said against it, as that it is a novel one, a licentious one, and a set of irrational principles, and whatever is the opposition that is made against it, though bonds and afflictions, reproach and persecution in every shape attend it, yet none of these things should move them from it. Perhaps that particular doctrine of faith, the resurrection of the dead, may be greatly regarded. Moreover, standing in the profession of faith, both of the grace and doctrine of faith, may be intended; for as this is to be made, it is to be held fast, and stood fast in, without wavering, by all true believers, who have great encouragement so to do from the person and grace of Christ, and from the love and faithfulness of God, and the many gracious promises he has made. Wherefore,
quit yourselves like men, be strong; a like phrase is often used by the Septuagint interpreters, as in Deuteronomy 31:6, from whence the apostle seems to have taken it. It answers to the Hebrew word in Isaiah 46:8.
Quit you like men; like men of wisdom and understanding; be not like children for non-proficiency, instability, and weakness; see 1-Corinthians 14:20; act the part of men; believe not every spirit; be not carried and tossed about with every wind of doctrine; search the Scriptures, and try every doctrine by them; and having found what is truth abide by it, and be proficients in it, instructing and establishing yourselves and others. In which sense the Jews use this phrase, saying (b),
"in a place where there are no men, , "study to be a man", or to show thyself a man;''
which one of their commentators (c) explains thus;
"use and accustom thyself to obtain excellent things, and afterwards when there are no wise men to teach, then do thou teach thyself.''
And another (d) after this manner;
""in the place where there is no man" to sit at the head and teach doctrines,''
do thou. Or play the man, as in 2-Samuel 10:12; act like men of valour and courage, stand fast, keep your ground, and contend earnestly for the faith; be valiant for the truth on earth; fight the good fight of faith: it is a good cause believers are engaged in; they have a good Captain and Commander at the head of them; they are provided with good weapons, may be sure of victory, and of having the crown of righteousness, life, and glory: wherefore
be strong; that is, for the faith: so the Targumist on Jeremiah 9:3 renders the phrase, "they are not valiant for the truth, , they are not strong for the faith: be strong"; not in themselves, but in the Lord, and in the power of his might; in the grace that is in Christ Jesus; believe in him, look to him for strength as well as righteousness; trust in his power, whose arm is not shortened; depend on his grace, which is always sufficient; take heart, be of good courage, and fear no enemy; see Joshua 1:6, which seems to be particularly referred to here.
(b) Misn. Pirke Abot, c. sect. 5. Vid. T. Bab Beracot, fol. 63. 1. (c) Maimon. in Misn. ib. (d) Bartenora in Misn. Beracot, fol. 63. 1.

A Christian is always in danger, therefore should ever be on the watch. He should be fixed in the faith of the gospel, and never desert or give it up. By this faith alone he will be able to keep his ground in an hour of temptation. Christians should be careful that charity not only reigns in their hearts, but shines in their lives. There is a great difference between Christian firmness and feverish warmth and transport. The apostle gave particular directions as to some who served the cause of Christ among them. Those who serve the saints, those who desire the honour of the churches, and to remove reproaches from them, are to be thought much of, and loved. They should willingly acknowledge the worth of such, and all who laboured with or helped the apostle.

He shows that they ought to make their hopes of salvation to depend not on Apollos or any other teacher; that it rests with themselves. "Watch ye": for ye are slumbering. "Stand": for ye are like men tottering. "Quit you like men; be strong": for ye are effeminate (1-Corinthians 16:14). "Let all your things be done with charity" (1-Corinthians 8:1; 1-Corinthians 13:1): not with strifes as at present [CHRYSOSTOM]. "In the faith" which was assailed by some (1-Corinthians 15:1-2, 1-Corinthians 15:12-17).

Watch ye. Be on the watch; a matter very needful in as gay and corrupt a city as Corinth.
Let all . . . be done in love. Compare chapter 13. This would prevent the divisions which he had rebuked in chapters 1-4.

To conclude. Watch ye - Against all your seen and unseen enemies. Stand fast in the faith - Seeing and trusting him that is invisible. Acquit yourselves like men - With courage and patience. Be strong - To do and suffer all his will.