I confess my disappointment that so much teaching about the last days is focused on the order of events. In my view, when Scripture tells us about the return of Christ, it doesn’t give us this information so that we can put it on a chart and watch the events as they pass by. That would be catering to our intellectual pride, among other things. Why, then, does Scripture have so much to say about the last days? So that we can reorder our lives in the light of Jesus’ coming.
First, the coming of Christ should reorder our priorities. In 2 Peter 3:11–12, the apostle says:
Since all these things are thus to be dissolved, what sort of people ought you to be in lives of holiness and godliness, waiting for and hastening the coming of the day of God, because of which the heavens will be set on fire and dissolved, and the heavenly bodies will melt as they burn!
Cf. 1 Cor. 7:26. Since God is going to destroy the present earth and replace it with a new heavens and a new earth, what sort of people should we be? The implicit answer: not people who care a lot about material things, or the pleasures of this life, but people who are passionate about the kingdom of God, which will remain for all eternity. That’s not to say that there is something evil about material things, only that we should be using them for God’s purposes, not just our own.
Second, if we are eager for Christ to return, we should be purifying ourselves (2 Peter 3:11–12). Every Christian not only should believe in the return of Christ, but should be eager for it to come. At the end of the book of Revelation, the church prays, “Even so, come, Lord Jesus” (Rev. 22:20 KJV). But if we are really so eager for Jesus to return, so eager for the new heavens and new earth, we should be seeking to be as pure as we will one day be in God’s presence. First John 3:2–3 says:
Beloved, we are God’s children now, and what we will be has not yet appeared; but we know that when he appears we shall be like him, because we shall see him as he is. And everyone who thus hopes in him purifies himself as he is pure.
Another ethical implication of the return of Christ is its encouragement. It shows us that our labors for him today are not in vain. Paul says in 1 Corinthians 15:58, “Therefore, my beloved brothers, be steadfast, immovable, always abounding in the work of the Lord, knowing that in the Lord your labor is not in vain.” That’s a great comfort in the midst of difficulty. The things of this world are going to be burned up, but our labor for the Lord will bear fruit for eternity.
Fourth, our very ignorance of the time of Jesus’ return has ethical implications. For that ignorance implies that we must be ready at any time for his return (Matt. 24:44; 1 Thess. 5:1–10; 1 Peter 1:7; 2 Peter 3:14). When he comes, we want him to find us busy in our callings, in the work of the Great Commission.
Finally, when Jesus comes, we will receive a reward, and we should look forward to that reward in our labors here. That reward should motivate us to good works here and now. In chapter 50, I mentioned that biblical emphasis on rewards, and many Scripture texts emphasize this: Matt. 5:12, 46; 6:1–4; 10:41–42; Rom. 14:10; 1 Cor. 3:8–15; 9:17–18, 25; 2 Cor. 5:10; Eph. 6:7–8; Col. 3:23–25; 2 Tim. 4:8; James 1:12; 1 Peter 5:4; 2 John 8; Rev. 11:18.
Again, God doesn’t expect us to do our duty merely for duty’s sake, but to do our duty with full understanding that our Father will reward his children, not only in this life (Mark 10:29–30), but in eternity as well.
From the biblical emphasis, I conclude that the main reason that God speaks so much in Scripture about the return of Jesus is that this doctrine purifies the hearts of his people. May he use it to purify you and me, as we continue on our journey to glory.
John M. Frame, Systematic Theology: An Introduction to Christian Belief (Phillipsburg, NJ: P&R Publishing, 2013), 1094–1096.