Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.

People's New Testament

3:3 Remember therefore how thou hast received and heard. Remember the teaching formerly received,

hold fast, cling to it,

and repent of the falling away from it.

I will come on thee as a thief. Suddenly; in a sudden judgment.

Wesley's Notes

3:3 Remember how - Humbly, zealously, seriously. Thou didst receive the grace of God once, and hear - His word. And hold fast - The grace thou hast received. And repent - According to the word thou hast heard.

Jamieson-Fausset-Brown Bible Commentary

3. how thou hast received-(Col 2:6; 1Th 4:1; 1Ti 6:20). What Sardis is to "remember" is, not how joyfully she had received originally the Gospel message, but how the precious deposit was committed to her originally, so that she could not say, she had not "received and heard" it. The Greek is not aorist (as in Re 2:4, as to Ephesus, "Thou didst leave thy first love"), but "thou hast received" (perfect), and still hast the permanent deposit of doctrine committed to thee. The word "keep" (so the Greek is for English Version, "hold fast") which follows, accords with this sense. "Keep" or observe the commandment which thou hast received and didst hear.

heard-Greek aorist, "didst hear," namely, when the Gospel doctrine was committed to thee. Trench explains "how," with what demonstration of the Spirit and power from Christ's ambassadors the truth came to you, and how heartily and zealously you at first received it. Similarly Bengel, "Regard to her former character (how it once stood) ought to guard Sardis against the future hour, whatsoever it shall be, proving fatal to her." But it is not likely that the Spirit repeats the same exhortation virtually to Sardis as to Ephesus.

If therefore-seeing thou art so warned, if, nevertheless, &c.

come on thee as a thief-in special judgment on thee as a Church, with the same stealthiness and as unexpectedly as shall be My visible second coming. As the thief gives no notice of his approach. Christ applies the language which in its fullest sense describes His second coming, to describe His coming in special judgments on churches and states (as Jerusalem, Mt 24:4-28) these special judgments being anticipatory earnests of that great last coming. "The last day is hidden from us, that every day may be observed by us" [Augustine]. Twice Christ in the days of His flesh spake the same words (Mt 24:42, 43; Lu 12:39, 40); and so deeply had His words been engraven on the minds of the apostles that they are often repeated in their writings (Re 16:15; 1Th 5:2, 4, 6; 2Pe 3:10). The Greek proverb was that "the feet of the avenging deities are shod with wool," expressing the noiseless approach of the divine judgments, and their possible nearness at the moment when they were supposed the farthest off [Trench].

Matthew Henry's Concise Commentary

3:1-6. The Lord Jesus is He that hath the Holy Spirit with all his powers, graces, and operations. Hypocrisy, and lamentable decay in religion, are sins charged upon Sardis, by One who knew that church well, and all her works. Outward things appeared well to men, but there was only the form of godliness, not the power; a name to live, not a principle of life. There was great deadness in their souls, and in their services; numbers were wholly hypocrites, others were in a disordered and lifeless state. Our Lord called upon them to be watchful against their enemies, and to be active and earnest in their duties; and to endeavour, in dependence on the grace of the Holy Spirit, to revive and strengthen the faith and spiritual affections of those yet alive to God, though in a declining state. Whenever we are off our watch, we lose ground. Thy works are hollow and empty; prayers are not filled up with holy desires, alms-deeds not filled up with true charity, sabbaths not filled up with suitable devotion of soul to God. There are not inward affections suitable to outward acts and expressions; when the spirit is wanting, the form cannot long remain. In seeking a revival in our own souls, or the souls of others, it is needful to compare what we profess with the manner in which we go on, that we may be humbled and quickened to hold fast that which remains. Christ enforces his counsel with a dreadful threatening if it should be despised. Yet our blessed Lord does not leave this sinful people without some encouragement. He makes honourable mention of the faithful remnant in Sardis, he makes a gracious promise to them. He that overcometh shall be clothed in white raiment; the purity of grace shall be rewarded with the perfect purity of glory. Christ has his book of life, a register of all who shall inherit eternal life; the book of remembrance of all who live to God, and keep up the life and power of godliness in evil times. Christ will bring forward this book of life, and show the names of the faithful, before God, and all the angels, at the great day.