Who said "The roots of perseverance are often watered by tears."?

This quote is attributed to François Mauriac.

The roots of perseverance are often watered by tears. - François Mauriac

"The roots of perseverance are often watered by tears."

François Mauriac Perseverance

Novelist French 1885–1970

"The writer's duty is to tell the truth as he sees it."

"We must love one another or die."

"Faith is not a luxury for the few; it is a necessity for all."

"The greatest tragedy is indifference."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."