The comment "Failure is the condiment that gives success its flavor" is ascribed to which writer?

Question

Which German writer, one of the key figures of the movement of Weimar Classicism in the late 18th and early 19th centuries, produced the two-part drama "Faust", numerous poems and the novel "The Sorrows of Young Werther"?

Answer 1

Truman Capote
The comment appears in his work "Self-Portrait" (1972).