So much clutter in a man's early life--so much fog, such that we can only see a short way into the future. Then, middle age. Things settle, and, hey, suddenly we have an uninterrupted view all the way to the end of the road. The mistake here is the inexperienced traveller’s mistake of thinking "because I can see my destination, I’m already in some sense at my destination". Because I can see the sequence that will lead to my dotage, I have already somehow gone past it, I’m already dead. Many men fall into this habit of thinking. (‘Because I can see the horizon I’m already at the horizon, and there’s nothing over the horizon …)
But then again, all of is are necessarily inexperienced traveller in this business of life.