The Impending Advent is the theme which pervades [the book of Revelation] from its commencement to its close. And just in proportion as he who is awake to the great truth of the Saviours speedy coming, and is engaged in waiting and preparing himself accordingly, is a better man, and in a safer condition, and really more happy, than the half-Christian and lukewarm;in that same proportion is he who reads, hears, and keeps the words of this prophecy blessed beyond all other people.1
What a check, what an incentive, what a bridle, what a spur, such thoughts as these would be to us! Take this for the guide of your whole life. Act as if Jesus would come during the act in which you are engaged; and if you would not wish to be caught in that act by the Coming of the Lord, let it not be your act.Charles Spurgeon, Watching for Christs Coming in Sermons on the Second Coming of Christ, 137-138.2
1 J. A. Seiss, The Apocalypse: Lectures on the Book of Revelation (Grand Rapids, MI: Zondervan Publishing House, 1966), 28.