And what then? In Acts 1:10-11 we read: “Two men stood by them in white apparel; which also said, Ye men of Galilee, why stand ye gazing up into heaven? This same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.” If you think that Jesus finished when He died and was buried, listen to the message of Luke, listen to this treatise written to Theophilus—it is written to you. He will come again, even as He went. He will return, in bodily, visible fashion, riding the clouds of heaven, surrounded by the holy angels. And He will judge the world in righteousness and set up His glorious kingdom, to which there shall be no end.
That is the message of Christianity. That is what has made the church what it is. Do men and women need to be told about some kind of program that will give them better conditions? That is not our greatest need. Our greatest need is to know God. If we were all given a fortune, would that solve our problems? Would that solve our moral problems? would that solve the problem of death? Would that solve the problem of eternity? Of course not. The message of Christianity is not about improving the world, but about changing people in spite of the world, preparing them for the glory that is yet to come. This Jesus is active and acting to that end, and He will go on until all the redeemed are gathered in, and then He will return, and the final judgement will take place, and His kingdom will stretch from shore to shore.
That is the message that turned the ancient world upside-down. It is the only message, and I want to ask you a simple question: What does this message mean to you? What is your idea of Christianity? What do you think the business of the church is? Do you say, “I don’t want your sermons, I don’t want your argumentation—I just want to feel that I’ve said my prayers and paid my respects, as it were, to God, before I go out and do what I like”? Is it that? Do you think Christianity is something you can take up and use as a minimum, in the hope that it will somehow put you right? Or is it the most amazing and astounding thing that ever happened or will ever happen? Is it the thing by which you live, the thing that you long to know and to experience more and more? Do you realize that this Jesus came into the world to save you from hell, from the punishment that your sins and mine so richly deserve? Do you realize now that the essence of Christianity is not that it calls you to do something, but rather that it tells you what Jesus came into the world to do for you?
D. Martyn Lloyd-Jones, Authentic Christianity, 17-18