Who said "Optimism is not blindness, but clear vision."?

This quote is attributed to Elie Metchnikoff.

Optimism is not blindness, but clear vision. - Elie Metchnikoff

"Optimism is not blindness, but clear vision."

Elie Metchnikoff Happiness

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."

"Babalú!"

"My greatest joy is making people smile."

"Laughter and love make a home."

"The best things in life are free."