“Meditation on inevitable death should be performed daily.
Every day when one’s body and mind are at peace, one should
meditate upon being ripped apart by arrows, rifles, spears and
swords, being carried away by surging waves, being thrown into
the midst of a great fire, being struck by lightning, being shaken
to death by a great earthquake, falling from thousand-foot cliffs,
dying of disease or committing seppuku at the death of one’s
master. And every day without fail one should consider himself
as dead.”
―
Yamamoto Tsunetomo,
Hagakure: The Book of the Samurai