The Signs of the Day of Judgment

"The first thing for us to understand is that although the signs preceding the judgment day are many and great, they will all be fulfilled, even though none or very few men take note of or esteem them as such.  For two things must take place according to the Word and prophecy of Christ and the apostles:  first, that many and great signs will be made manifest; and secondly, that the last day will come unawares, the world not expecting it, even though that day be at the door.  Though men see these signs, yea, be told that they are signs of the last day, still they will not believe, but in their security mockingly say:  'Thou fool, hast thou fear that the heavens will fall and that we shall live to see that day?'"

Luther's introduction to a sermon on Luke 21:25-36, first delivered in 1522.