Period, or exclamation mark

“There’s something satisfying about hearing a pop song’s reiteration of a simple truth, for instance the banality of not knowing what you’ve got until it’s gone. You lose someone, but at the same time gain a more complete picture of the love you nonetheless felt for that person. That’s one way of putting it. But one might also consider that time changes everything; that the next day will always be new; that in a way it’s too late to learn what you had to lose after you’ve already lost it--the glancing back over your shoulder, or the longer look, reveals the land you’ve covered to be different from the land in which you lived. The fields you left behind, the distance measured out in units of assumptions and kilometers.”