When life is as light and smooth as a song, it is easy to keep smiling; and only those who can still smile when everything is going wrong will live a valuable life.

—— Wilcox De

Sunshine and flowers are in the optimistic smile, desolation and pain are in the pessimistic sigh.

Life is about facing a true smile, about overcoming obstacles and looking at the future. --Hugo

Only those who speak with a smile can shoulder important responsibilities.--Western Proverb

Facing the light, the shadow is behind us - Helen Keller

Smile is a language with multiple meanings. -- Spitler

If a woman forgets to put on makeup when going out, the best remedy is to show off your smile. --Cindy Crawford

Strictly speaking, it is difficult to find famous quotes that literally contain the word smile. The following poem (?) seems to be quite popular. I don’t know who wrote it. Take a look. Is it useful?

*Smile

It takes no effort to smile, but it produces endless charm

The bribe taker becomes rich, but the giver does not Becoming poor

It is fleeting, but often leaves lasting memories

Although the rich are rich, no one is willing to abandon them

Although the poor are poor, But no one can give it

It brings family joy and is a wonderful expression of friendship

It can relieve the tired and give courage to the desperate

If by chance you meet someone who doesn’t give you the smile you deserve

then give your smile generously to him

Because there is no one who can’t give more than that. He who smiles at others needs him more.