Who said "Hope without action is merely wishful thinking."?

This quote is attributed to Elie Metchnikoff.

Hope without action is merely wishful thinking. - Elie Metchnikoff

"Hope without action is merely wishful thinking."

Elie Metchnikoff Hope

Immunologist Russian 1845–1916

"Man can adapt himself to anything, but he cannot adapt himself to anything without effort."

"The study of the lower organisms is the key to the understanding of man."

"Optimism is a moral duty."

"Life is a process of constant transformation."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."