How long will it be before I become the doddering driver that currently triggers my impatience?
Are you a patient driver, no matter the situation? If yes, ignore today's perspective question. But I suspect only folks who walk on water and the delusional will have too much trouble substituting a different circumstance where people older than you test your patience, at least sometimes. Sitting still recently in a long line of cars waiting for a driver who appeared to make no distinction between yield and stop, I allowed myself to get frustrated.
After the throng finally got on the Interstate and I passed the individual who had remained motionless until there wasn't a single car within line of sight of the on ramp, I wasn't surprised at what the driver looked like. My holier-than-thou attitude toward the pokey codger gave me roughly two minutes of condescending satisfaction. And then suddenly I realized - unless my eyesight had let me down, that confounded slowpoke was no more than ten years older than I. Shit.