1 Corinthians 1:8

Who shall also confirm you, so far as His part is; i.e., shall give grace which can confirm you, and shall confirm you indeed, if you are willing to receive it, to use it, and to confirm yourselves in the faith and love of Christ: shall confirm you, I say, for this, that ye may be, and may persevere unto the end (of life) blameless; that is, unaccused, whom no one can charge with having committed anything against the faith and love of Christ. The Apostle speaks to the whole Church, in which the greater number were holy and blameless, although some few were sowing schisms, and these in the following verse he reproves and condemns.

In the day of our Lord Jesus Christ. It is an ellipse common with the Apostle: for we must supply, that ye may be and may appear, blameless in that day of the advent and judgment of Christ.