We live in this beautiful loop, this infinity symbol of a life. We cross each other's paths, veer away, only to come back at some point in the journey.
Whether we recognize our past on the road is another matter. We're so often looking down or looking up or (worse), stuck on the side of the road clutching a weathered, out-dated signpost, refusing to move on.
Perhaps think of it this way: instead of a one-way ticket in this life (which is what gets us so fizzy and flustered in the first place), think of it as an open-ended, round-trip ticket. No timelines, no train tables, no arrival or departure times, and no worries about delays or bad weather. There is always movement forward and always, eventually, a return trip home.
What you leave, you never leave for long; it's just up to you what you pick up on the way back.
Chances are, you (or the scenery) has changed so much that the that familiarity becomes unrecognizable.