The warrior knows about the ‘waterfall effect’.
He has often seen someone mistreating another person who lacks the courage to respond.
Then, out of cowardice and resentment, that person vents his anger on someone weaker than himself, who takes it out on someone else, in a veritable torrent of misery.
No one knows the consequences of his own cruelty.
That is why the warrior is careful in his use of the sword and only accepts an opponent who can fight with him.
In moments of rage, he punches a rock and bruises his hand.
The hand will heal eventually, but the child who got beaten because his father lost a battle will bear the marks for the rest of his life