笑う門には福来たる (Warau kado ni wa fuku kitaru)

Meaning: Happiness and good fortune come to cheerful people.

Literally: Fortune comes to the gate that laughs

Example: “いつも笑顔でいよう。笑う門には福来たるだよ。” — Always keep smiling: laughter brings good fortune.

Equivalents in English, French, Spanish, German, Italian, and Polish

English: Laughter is the best medicine
French: Le rire est le meilleur remède (literally: Laughter is the best remedy)
Spanish: La risa es la mejor medicina (literally: Laughter is the best medicine)
German: Lachen ist die beste Medizin (literally: Laughter is the best medicine)
Italian: Il riso fa buon sangue (literally: Laughter makes good blood)
Polish: Śmiech to zdrowie (literally: Laughter is health)

Origin: Kado is the gate of a house: good luck visits the household where laughter is heard.

Colorful expressions from dozens of languages, with their word-for-word translations.

杞憂 (Kiyū) Unnecessary worry about things that won't happen; baseless anxiety.
傍若無人 (Bōjaku-bujin) Behaving without regard for others' feelings or presence around you.
一期一会 (Ichi-go ichi-e) Treasure each encounter as unique and irreplaceable in life.

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