The thinker sees his own actions as experiments and questions, as seeking explanations of something: to him, success and failure are primarily answers.
 
[Der Denker sieht in seinen eigenen Handlungen Versuche und Fragen, irgend worüber Aufschluss zu erhalten: Erfolg und Misserfolg sind ihm zu allererst Antworten.]

Friedrich Nietzsche (1844-1900) German philosopher and poet

The Gay Science [Die fröhliche Wissenschaft], Book 1, § 41 (1882) [tr. Nauckhoff (2001)]
    (Source)

Also known as La Gaya Scienza, The Joyful Wisdom, or The Joyous Science.

(Source (German)). Alternate translations:

The thinker sees in his own actions attempts and questionings to obtain information about something or other; success and failure are answers to him first and foremost.
[tr. Common (1911)]

A thinker sees his own actions as experiments and questions -- as attempts to find out something. Success and failure are for him answers above all.
[tr. Kaufmann (1974)]

In his own actions, the thinker sees experiments and enquiries from which he seeks to obtain insight: to him, success and failure are, first of all, answers.
[tr. Hill (2018)]