Enthusiasm is one of the most powerful engines of success. When you do a thing, do it with all your might. Put your whole soul into it. Stamp it with your own personality. Be active, be energetic and faithful, and you will accomplish your object. Nothing great was ever achieved without enthusiasm.
-- Ralph Waldo Emerson

I can't imagine a person becoming a success who doesn't give this game of life everything he's got.
-- Walter Cronkite

Our lives are far too precious and far too short to spend it on things which don't fill you with passion and enthusiasm. Your life is worthy of being spent on things you love, on living with maximum passion, and extracting as much of what life has to offer during your time here. The more you do what you love, the more you will fill yourself with passion and joy. The more you are filled with passion and joy, the more you can share that passion and joy with others. Living passionately is the best thing you can do for yourself and for the world around you.