Today is World Smile Day and the history of the day is truly something to smile about. Starting in 1999, the first Friday in October has served as World Smile Day ever since artist Harvey Ball decreed it so. If the name Harvey Ball doesn’t ring a bell, you don’t know your smile history well enough, because he is the artist who created the smiley face in 1963, and since then the image has served as an internationally accepted symbol for happiness. And while the smiley face has impacted our culture, the overall importance of a smile has as well. The power of a smile has been documented by authors, activists, singers, and of course film! Check out the top 15 most famous quotes about the power of smiling in celebration of World Smile Day!

“Don't cry because it's over. Smile because it happened.”—Dr. Seuss

“We shall never know all the good that a simple smile can do.”—Mother Teresa

“Smile in the mirror. Do that every morning and you'll start to see a big difference in your life.”—Yoko Ono

“When I look out at the people and they look at me and they're smiling, then I know that I'm loved. That is the time when I have no worries, no problems.”—Etta James

“I think that anybody that smiles automatically looks better.”—Diane Lane

“And then he gives me a smile that just seems so genuinely sweet with just the right touch of shyness that unexpected warmth rushes through me.”–Suzanne Collins, “The Hunger Games”

“If you have only one smile in you, give it to the people you love. Don't be surly at home, then go out in the street and start grinning 'Good morning' at total strangers.”—Maya Angelou

“You'll find that life is still worthwhile, if you just smile.”—Charlie Chaplin

“Anyone who has a continuous smile on his face conceals a toughness that is almost frightening.”—Greta Grabo

“Too often we underestimate the power of a touch, a smile, a kind word, a listening ear, an honest compliment, or the smallest act of caring, all of which have the potential to turn a life around.”—Leo Buscaglia

“But you're so busy changing the world. Just one smile can change all of mine.”—Jack Johnson, “Angel”

“Smile at strangers and you just might change a life.”—Steve Maraboli

“Fly me up to where you are beyond the distant star. I wish upon tonight to see you smile, if only for a while to know you're there. A breath away's not far to where you are.”—Josh Groban, “To Where You Are”

“She smiled, and there it was again, that aching pressure in his chest. Love, or a heart attack. Kind of the same thing.”—Krista Higgins, “Somebody To Love”

“When he smiles it's as if you'd just told him the first joke on earth.”—Mitch Albom, “Tuesdays with Morrie”