Aphorisms [Aphorismen], No. 91 (1880) [tr. Wister (1883)] - Ebner-Eschenbach, Marie von | WIST Quotations
There is only one proof of ability -- action. [Für das Können gibt es nur einen Beweis: das Tun.] (Source (German)). Alternate translation: There is only one proof of ability: doing it. [tr. Scrase/Mieder (1994)]
