Who said "Gratitude is the gateway to abundance and contentment."?

This quote is attributed to Léopold Sédar Senghor.

Gratitude is the gateway to abundance and contentment. - Léopold Sédar Senghor

"Gratitude is the gateway to abundance and contentment."

Léopold Sédar Senghor Gratitude

President, Poet Senegalese 1906–2001

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