If a warrior is not unattached to life and death, he will be of no use whatsoever. Yamamoto Tsunetomo Instagram sharing coming soon. Quote text and source copied to clipboard. Link to this quote copied to clipboard. More information about this quote Topic Martial courage Courage War Author Yamamoto Tsunetomo Source Hagakure Genre Philosophical literature Religious literature Language Japanese Time 1716 1710s 18th century Occupation Samurai Philosopher Writer From Japan Asia Authentication Score 3 More information on Authentication Score coming soon. Citation Yamamoto, Tsunemomo. 葉隠 [Hagakure]. c. 1716. Citation text copied to clipboard.