Speech at celebration honoring his seventieth birthday, the Sorbonne, Paris, France (December 27, 1892); "The life of Pasteur" by René Vallery-Radot, translated by Mrs. R. L. Devonshire, Vol. 2, (p. 297), 1902.
Miyamoto Musashi, Yamamoto Tsunetomo, Inazo Nitobe (2010). “Honor: Samurai Philosophy of Life - The Essential Samurai Collection; The Book of Five Rings, Hagakure: The Way of the Samurai, Bushido: The Soul of Japan.”, p.16, Bottom of the Hill