This is how C.S. Lewis understands the doctrine of the Second Coming of our Lord. He said that when the author appears on the stage, you know the play is over. That's good isn't it? When the author appears on the stage - the play is over. No one has ever claimed that this planet earth was intended to exist forever. Scientists call it "the second law of thermodynamics,"The energy supply of this planet will eventually come to an end, which means that a conclusion of life as we know it is inevitable. The concept of the Second Coming merely affirms that such a conclusion will be purposeful. The drama of history is not going to just fizzle out or end in a whimper! It is going to come to the kind of climax that he who conceived the drama wants for it, and it means that he who has begun a good work in you will bring it to the best of conclusion.