Mortality Realized

At what point in our lives do we come to the sobering realization that we are mortal? For some people that may occur surviving a near death occurrence. It may occur when a close friend dies. It may occur when your 1st born has a 19th birthday as my son did yesterday and you can not remember your 19th. You know it happen because 54 is here and 55 is knocking on the door. I remember when he was born and all the events that surrounded his arrival, but that was not 19 years ago...was it? Then I looked up and saw the 2nd child and remembered the circumstances surrounding her arrival and now she approaches 18. So, When did I start losing track of time? Should the Lord delay His coming for another 20 years I will have to deal with body break down (another sobering point). Oh well, serious time is over. What do you think? Let me know. In the mean time I am going to go outside and play!!