TIME
It is the one thing that means more than material things. It is constant and never gets old. It is the thing we need the most, waste more than anything else, love having a lot of, regret not giving, is the hardest to find, is painful to give (much harder than money), but matters the deepest in all relationships when given. It moves too fast, never slows down, and like all things is controlled by God. It is TIME.