A smile costs nothing but gives much.
and is the countersing of friendship. It brings rest to the weary, cheer to the discouraged, sunshine to the sad, and it is nature's best antidote for trouble. Yet it cannot be bought, begged, borrowed, or stolen, for it is something that is of no value to anyone untill it is given away.
Some people are too tired to give you a smile, Give them one of yours, as none needs a smile so much as he who has no more to give.