Who said "A grateful heart is a rich heart."?

This quote is attributed to Haydée.

A grateful heart is a rich heart. - Haydée

"A grateful heart is a rich heart."

Haydée Gratitude

Character in The Count of Monte Cristo

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"Forgive me, but I love the beautiful things of this world."

"Love is the most powerful force in the world."

"The heart has reasons which reason knows nothing of."

"The heart knows truths that the mind cannot comprehend."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"