We are part of the great puzzle of life, and without us it is not complete. . . .

Everything you do makes a difference.  Everything you don't do makes a difference, too.  If you wave your arm you create a breeze.  What does that do to the weather?  The effect may be small, but there is an effect, and combined with other small effects it can have a significant effect.  Every act we perform has some effect on the choices other people make and the world we live in.  We are part of the great puzzle of life, and without us it is not complete. . . .

Every act has its effect.  To do nothing is an act that stems from feelings of hopelessness and despair.  Please remember, no matter how dark the future looks, you can make a difference.  When you live the true life you were sent here to live, the difference you make will enhance life rather than destroy it.  Do not spend time worrying how big a difference you make.  Anything that enhances a life makes a difference; helping one individual recover from a broken heart; easing one person's pain; helping one ugly duckling discover his or her beauty.  Keep working as long as you live, and live as long as you can, and when you finish your marathon they will hang a medal around your neck that says, "You Make a Difference." 

Bernie Siegel.