Quote by Gustave Flaubert
"Lack of gratitude is the root of all evil."
More from Gustave Flaubert
"The artist must be in his work like God in creation, invisible yet all-powerful."
"Writing is a dog's life, but the only life worth living."
"The heart has its reasons which reason knows nothing of."
"One should as a rule respect public opinion in so far as is necessary to avoid starvation and to prevent one's ear drums from bursting, but anything that goes beyond this is voluntary submission to an unnecessary tyranny."