Trimmed their lamps - Burning until midnight, the oil was exhausted: they gave a dim and obscure light. They trimmed them by removing the burnt parts of the linen or the torch, so that they would burn clear. It was needful, also, to dip them again in oil, or to pour oil upon them. This strikingly represents the conduct of most people at the approach of death. They then begin to make ready. They are alarmed, anxious, and trembling, and then they ask the aid of others, but often when it is forever too late.

Trimmed their lamps - Εκοσμησαν, adorned them. I have seen some of the eastern lamps or lanthorns, the body of which was a skeleton of wood and threads, covered with a very thin transparent membrane, or very fine gauze, and decorated with flowers painted on it. It is probable that the nuptial lamps were highly decorated in this way; though the act mentioned here may mean no more than preparing the lamps for burning.
The following account of the celebration of a wedding in Persia, taken from the Zend Avesta, vol. ii. p. 558, etc., may cast some light on this place.
"The day appointed for the marriage, about five o'clock in the evening, the bridegroom comes to the house of the bride, where the mobed, or priest, pronounces for the first time the nuptial benediction. He then brings her to his own house, gives her some refreshment, and afterwards the assembly of her relatives and friends reconduct her to her father's house. When she arrives, the mobed repeats the nuptial benediction, which is generally done about Midnight; immediately after, the bride, accompanied with a part of her attending troop, (the rest having returned to their own homes), is reconducted to the house of her husband, where she generally arrives about three o'clock in the morning. Nothing can be more brilliant than these nuptial solemnities in India. Sometimes the assembly consists of not less than two thousand persons, all richly dressed in gold and silver tissue; the friends and relatives of the bride, encompassed with their domestics, are all mounted on horses richly harnessed. The goods, wardrobe, and even the bed of the bride, are carried in triumph. The husband, richly mounted and magnificently dressed, is accompanied by his friends and relatives, the friends of the bride following him in covered carriages. At intervals, during the procession, guns and rockets are fired, and the spectacle is rendered grand beyond description, by a prodigious number of Lighted Torches, and by the Sound of a multitude of musical instruments."
There are certain preparations which most persons believe they must make at the approach of death; but, alas! it is often too late. The lamp is defiled, the light almost out, and the oil expended; and what adorning is a wretched sinner, struggling in the agonies of death, capable of preparing for his guilty soul!

Then all these virgins arose,.... Not out of their graves; for the righteous and wicked will not rise together; the dead in Christ will rise first, and this first resurrection will not be till Christ is come; nor will grace be to be had, or be thought to be had after the resurrection; nor will there be any trimming of lamps then, in order to meet the bridegroom, for he will be come: nor out of the graves of sin; for the wise virgins were not in such a state, and the foolish virgins were never brought out of it: but the meaning is, that they arose out of their sleepy and slumbering frame. True believers may fall into a very low condition, with respect to the exercise of grace, and discharge of duty; but they shall arise again, for they are held and upheld by the right hand of God: it is sometimes midnight with them, and they are fallen fast asleep, but they shall be awaked, and arise; which arising here, as it respects them, signifies, that they were thoroughly awaked, that they quitted their former place and posture, were upon their feet, and ready to meet the bridegroom. The foolish virgins also arose; which may intend some awakenings of conscience, and reformation of life, and a more diligent attendance on duties and ordinances; all which they did to make them meet for Christ, and to obtain salvation; but after all it appears, they were destitute of the oil of grace:
and trimmed their lamps: both wise and foolish: the former by removing what hindered the clear burning of them; by casting off the works of darkness, and causing the light of good works to shine before men, in the discharge of them, from a principle of grace; and chiefly by applying to Christ for fresh supplies of the oil of grace, to fill their lamps, revive their light and heat, and keep them burning: and the latter, only by a few outward decorations, and external performances; to make their outward profession of religion look as bright as possibly they could.

Then all those virgins arose, and trimmed their lamps--the foolish virgins as well as the wise. How very long do both parties seem the same--almost to the moment of decision! Looking at the mere form of the parable, it is evident that the folly of "the foolish" consisted not in having no oil at all; for they must have had oil enough in their lamps to keep them burning up to this moment: their folly consisted in not making provision against its exhaustion, by taking with their lamp an oil-vessel wherewith to replenish their lamp from time to time, and so have it burning until the Bridegroom should come. Are we, then--with some even superior expositors--to conclude that the foolish virgins must represent true Christians as well as do the wise, since only true Christians have the Spirit, and that the difference between the two classes consists only in the one having the necessary watchfulness which the other wants? Certainly not. Since the parable was designed to hold forth the prepared and the unprepared to meet Christ at His coming, and how the unprepared might, up to the very last, be confounded with the prepared--the structure of the parable behooved to accommodate itself to this, by making the lamps of the foolish to burn, as well as those of the wise, up to a certain point of time, and only then to discover their inability to burn on for want of a fresh supply of oil. But this is evidently just a structural device; and the real difference between the two classes who profess to love the Lord's appearing is a radical one--the possession by the one class of an enduring principle of spiritual life, and the want of it by the other.

All . . . arose, and trimmed their lamps. The object of trimming would be to secure a brighter light. It would involve the trimming of the wick and replenishing the oil if needed. When the cry does arise there will be a wonderful lamp-trimming.

They trimmed their lamps - They examined themselves and prepared to meet their God.