But, beloved, be not ignorant of this one thing, that one day is with the Lord as a thousand years, and a thousand years as one day. Be not ignorant - Though they are wilfully ignorant, neglect not ye the means of instruction.
One day is with the Lord as a thousand years - That is: All time is as nothing before him, because in the presence as in the nature of God all is eternity; therefore nothing is long, nothing short, before him; no lapse of ages impairs his purposes, nor need he wait to find convenience to execute those purposes. And when the longest period of time has passed by, it is but as a moment or indivisible point in comparison of eternity. This thought is well expressed by Plutarch, Consol. ad Apoll.: "If we compare the time of life with eternity, we shall find no difference between long and short. Τα γαρ χιλια, και τα μυρια ετη, στιγμη τις εστιν αοριστος, μαλλον δε μοριον τι βραχυτατον στιγμης· for a thousand or ten thousand years are but a certain indefinite point, or rather the smallest part of a point." The words of the apostle seem to be a quotation from Psalms 90:4.