But all our other interpreters understand "the commandment" here as faith and life according to faith. Even Blessed Theodoret, in the obligation to keep the commandment spotless and blameless, sees this lesson: "Do not mix anything alien with the divine teaching." That is, keep Christian doctrine pure.
The others add blameless life to pure belief. Saint Chrysostom says: "'That you keep the commandment spotless' means that you bring upon yourself not the slightest reproach, either in beliefs or in life." Oecumenius and Theophylact say: "So that you stain yourself in nothing, neither in dogmas nor in life."
If we accept this thought, we must recognize this whole apostolic charge (cf. 1 Tim 6:13-16) as the concluding word of the Epistle. The Apostle's discourse after this will then be a postscript, though related to the preceding word against covetousness.
After finishing the charge with a prayerful address to God, the Apostle remembered that not everything had been said about possessions. Namely, possessions are not to blame for their destructive effect, but their improper use. He added how wealth must be used, not to the harm of salvation, but as an aid to it. Having said this, he seems to repeat the charge, saying instead of "keep the commandment," "guard the deposit" (1 Tim 6:20). This word may be recognized as an interpretation of the earlier phrase, "keep the commandment."
"The commandment spotless and blameless." The commandment is always pure, spotless, and blameless, however much anyone violates it. But the one who violates it stains himself by what is opposed to the commandment, and through this becomes blameworthy.
"Until the appearing of the Lord." This does not mean that Saint Timothy is being foretold a continuation of life until the coming of the Lord. Rather, it expresses "forever," until the end of his life. For each person, the passage from this life into the other is the moment of standing before the Lord and, consequently, of the Lord's appearing to him, επιφανεια.
Saint Chrysostom says: "'Until the appearing of the Lord' means until your death, until your departure. He did not say it literally in that way, but said, 'until the appearing of the Lord,' in order to encourage him more." This was so as "to enliven and stir his zeal more by remembrance of the Lord's appearing, reminding him also of that dread glory" (Oecumenius, Blessed Theophylact). This means both the glory that will accompany the Lord appearing for judgment, and the glory that, after the judgment, will become the inheritance of believers counted worthy of blessed life.
Or the Apostle said this in the same sense in which the Lord said to the Apostles: "Lo, I am with you always, even to the end of the age" (cf. Mt 28:20). In the person of the Apostles the Lord saw all believers and blessed them with such a promise.
Here also, in the person of Saint Timothy, the Apostle saw all chief pastors and pastors. He established it as a law for them, by mutual succession, to keep this commandment, whether this means the faith of Christ or only non-possessiveness, until the appearing of the Lord. That is, until His second coming, the universal resurrection, the judgment, and the final decision of the lot of all. He suggests to them this warning: "Watch, for you do not know at what hour your Lord will come" (cf. Mt 24:42).