An excerpt from "Bible Tools.org" entitled, "What the Bible says about Insensitivity" states: "
As the pressure increases from this world, it brings stress with it. From studying people closely, psychologists know that those who face frequent, stressful hardship become apathetic. In other words, a person reaches the point where finally he just rolls over, plays dead, and says, "Who cares?"
With that in mind, it is no wonder that Jesus says in Matthew 24:13, "He that endures to the end, the same will be saved." The end time will be stressful, whether or not we are being directly affected physically. The spirit of the age, the zeitgeist, will impact upon our minds, and it will tend to make us feel tired, weary of the whole thing, wishing that God would hurry up and get it over with.
That is, of course, understandable. It also helps us to understand why the Bible says some of the things it does regarding the church at the end time. A large portion of the church will be lulled into worldliness through being more concerned with ordinary, self-centered, secular pursuits than with the spiritual work of God. Jesus' warning in Luke 21:34-36—"take heed to yourselves" and "watch . . . and pray always"—is absolutely essential."
Reference: Ephesians 4:19