Romans 13:12

The night is far spent
Not of Jewish darkness, which was gone, and was succeeded by the Gospel day; nor of former ignorance in Gentilism and unregeneracy, for that was past, and the true light shined; much less of security in the latter day, which was not yet come on; rather of persecution and distress for Christ's sake; but it is best of all to understand it of the present time of life; so it is called by the Jews ^F7, (hlyll hmwd hzh Mlweh) , "this world is like to the night": and which, in the best of saints, is attended with imperfection and darkness, errors and mistakes, in principle and practice, in doctrine and conversation; however, it is far spent, and in a little time will be over:

the day is at hand;
not the Gospel day, for that was already come; nor the day of grace, and spiritual light and comfort to their souls, for that also had taken place; nor the latter day glory, which then was at a distance; rather the approaching day of deliverance from present persecutions; but it is much better to understand it of the everlasting day of glory, which to particular persons was then, and now is at hand; a little while, and the night of darkness, affliction, and disconsolation will be over, and the day of glory will succeed, when there will be no more night, no more darkness, no more doubts, fears, and unbelief; but one continued series of light, joy, and comfort, and an uninterrupted communion with Father, Son, and Spirit; and which is another reason why the saints should not indulge themselves in sleep, but be active, since the halcyon days are at hand, as well as a reason why they should attend to the following exhortations:

let us therefore cast off the works of darkness;
as the apostle had made use of the metaphors of night and day, and of sleep, and awaking out of sleep, and rising in the morning to business, so he continues the same; and here alludes to persons throwing off their bed clothes, and covering of the night, and putting on proper raiment for the day. By "works of darkness" are meant evil works, which are opposite to the light; to God, who is light itself; to Christ, the light of the world; to the word of God, both law and Gospel, which is a light to our paths; to both the light of nature, and the light of grace: and which spring from the darkness of the mind, and are encouraged to by the god of this world, and by his angels, the rulers of the darkness of it; and which are generally done in the dark, and are such as will not bear the light; and, if grace prevent not, will end in outer darkness, in blackness of darkness, reserved by the justice of God, as the punishment of them. "Casting [them] off" expresses a dislike of them, a displicency with them, and an abstinence from them. Some copies read, "the armour of darkness", which agrees with what follows:

and let us put on the armour of light;
the whole armour of God, the use of which lies in the exercise of grace, and discharge of duty; particularly good works are designed here, which though they are not the believer's clothing, his robe of justifying righteousness, they are both his ornament and his armour; by which he adorns the doctrine of Christ, and defends his own character and principles against the charges find calumnies of then: these being performed aright, spring from the light of grace in a regenerate man, and are such as will bear the light to be seen of men; and are the lights which are to shine before men, that they beholding them, may glorify God; so virtue was by Antisthenes ^F8, called (anafaireton oplon) , "armour which cannot be taken away": the allusion is thought to be to the bright and glittering armour of the Romans; the Alexandrian copy reads, "the words of light".