Who said "Gratitude is the greatest of virtues."?

This quote is attributed to Sophocles.

Gratitude is the greatest of virtues. - Sophocles

"Gratitude is the greatest of virtues."

Sophocles Gratitude

Tragic Playwright Ancient Greece 496–406

"Wisdom brings suffering to those who possess it."

"Nobody likes the man who brings bad news."

"All that is and will be comes forth from necessity."

"To the man who is afraid everything rustles."

"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"