When you were born you were crying and everyone else was smiling. Live your life so at the end, your're the one who is smiling and everyone else is crying.
Yet what each one does is by no means of little moment. The grass has to put forth all its energy to draw sustenance from the uttermost tips of its rootlets simply to grow where it is as grass; it does not vainly strive to become a banyan tree; and so the earth gains a lovely carpet of green.