Time

"Do not squander time for that is the stuff life is made of."

- Benjamin Franklin

Personal Take:
I took this quote to mean 'don't sweat the small stuff,' which I am seemingly doing all of the time.  In caretaking for my Grandma, I have truly learned just how precious life is and how quickly time passes.  This is especially true the older we become.  We should never take the next day for granted.