Very seldom do we get to look back on things while we are flying past them as we can while driving... and the images are always closer than they appear (thinking about that cleverly shot scene in Jurassic Park with the T-Rex in pursuit).
While driving on an old country road, I was forced to stop for a family of ducks crossing the road and in that instant, even though I had been taking in the scenery as I was driving, in my rear-view mirror I had noticed something I had completely missed because I was looking at something else I presume. Truthfully we miss more than we see in just normal day to day activities. I'd like to say it isn't on purpose but, deep down I think it is to some extent. We have allowed ourselves to be trained to focus on certain things and as we drive through life and as a result, we become less and less attune to the things that do not fit into that parameter or paradigm. We get little digestible bits but never the full picture and our reality as a whole is skewed from the lack of vision. The interesting thing is that after we miss them, after we pass them, the wonky irony is that the hindsight is so clear and the fact we cannot go back blaringly obvious. I guess the point is, once you pass something, don't wait until it's too far in the distance to take a peek from the rear-view mirror.