Death and Thanksgiving. Each is a final sentence. Each sums up the story. These two final acts can occur at the end of every life. One most assuredly will.
Time is the agent of death on a daily basis.
With each tick of the clock, life's cuckoo sings our mortality. You are mortal, you are mortal. This minute is over, the day is passing. What has not happened today will never happen today. Future moves into past in every moment, like a car passing in the other direction, and we can hardly keep up with ourselves.