Without apocalypsis there cannot be change, without change then time itself would cease to pass.   Apocalypsis is the human capacity for change, for revelation, to open the door into a new understanding.   Ultimate Truth is unreachable to the human mind but it is the search for it that has enabled humanity to build godlike technology and ponder the secrets of the universe.

Without apocalypsis we could have no such paradigm shifts.  We would have remained in the dark of primitive man, unable to change our perceptions.  The search for something better, just at the edge of our perceptions so that the moment we turn it vanishes.  It does not seem to be a search for happiness, such a thing does not capture the complexity of human desire.   The search for the answer to what this thing that the soul desires is, that is what defines apocalypsis. 
In the words of Lloyd Alexander, “Sometimes it’s not the finding, but the seeking that counts.”