Who said "Gratitude without action is merely empty sentiment."?

This quote is attributed to Jean-Paul Marat.

Gratitude without action is merely empty sentiment. - Jean-Paul Marat

"Gratitude without action is merely empty sentiment."

Jean-Paul Marat Gratitude

Revolutionary, Journalist French 1743–1793

"The people's welfare must be our supreme law."

"It is forbidden to forbid the people the truth."

"The safety of the people is the supreme law."

"We must dare to be free."

"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"