I don’t know whether I will live that long:  the mattress we just bought is guaranteed for twenty years.  Frankly I don’t know if I will outlive the mattress.  In another twenty years I will be eighty-three.  I know my family is long-lived.  My Dad lived 91 years and my Mom was over 81 when she died.  Nevertheless I am not sure I will make it that long.  It gets me thinking, that is all.  I need to focus on the time allotted to me.  One never knows when one’s times runs out.