No living creature can laugh except man. Trees may bleed when they are wounded, and beasts in the field will cry in pain and hunger, yet only I have the gift of laughter and it is mine to use whenever I choose. Henceforth I will cultivate（培养，陶冶） the habit of laughter. I will smile and my digestion will improve; I will chuckle and my burdens will be lightened; I will laugh and my life will be lengthened for this is the great secret of long life and now it is mine.

I will paint this day with laughter; I will frame this night in song. Never will I labor to be happy; rather will I remain too busy to be sad. I will enjoy today's happiness today. It is not grain to be stored in a box. It is not wine to be saved in a jar. It cannot be saved for the morrow. It must be sown and reaped on the same day and this I will do, henceforth.

And with my laughter all things will be reduced to their proper size. I will laugh at my failures and they will vanish in clouds of new dreams; I will laugh at my successes and they will shrink to their true value. I will laugh at evil and it will die untasted; I will laugh at goodness and it will thrive and abound. Each day will be triumphant only when my smiles bring forth smiles from others and this l do in selfishness, for those on whom l flown are those who purchase not my goods.