Bushido: The Soul of Japan by Inazo Nitobe: “But a normal seppuku does not savor of fanaticism, or madness or excitement, utmost sang froid being necessary to its successful accomplishment. Of the two kinds into which Dr. Strahan divides suicide, the Rational or Quasi, and the Irrational or True, seppuku is the best example of the former type. Morselli, Suicide, p. 314.”