“if I see but one smile on your lips when we meet, occasioned by this or any other exertion of mine, I shall need no other happiness.”

“Let us make one point, that we meet each other with a smile, when it is difficult to smile. Smile at each other, make time for each other in your family.”

“There is joy in self-forgetfulness. So I try to make the light in others' eyes my sun, the music in others' ears my symphony, the smile on others' lips my happiness.”

“Your heart I take in mine. Whatever is in your heart shall be in mine, whatever is in mine shall be in yours. Our hearts shall be one, our minds shall be one. May God make us one.”

“There's enchantment in a smile, did you know?Shall I prove in a wink that it is so?Watch my mouth grin wide and see,How quick your lips smile back at me!”

“Mimicry, they argue, is also one of the means by which we infect each other with our emotions. In other words, if I smile and you see me and smile in response—even a microsmile that takes no more than several milliseconds—it’s not just you imitating or empathizing with me. It may also be a way that I can pass on my happiness to you.”