quem vive pela espada, morre pela espada

剣によって生き、剣によって死ぬ（暴力を使う者は暴力的な反応を期待できる）

English Meaning

live by the sword, die by the sword (one who uses violence can expect a violent response)

歴史の暗い時代、多くの人々は「刀で生きる者は、刀で死ぬ」という諺を学び、平和の道を選びました。

During the dark times in history, many learned that whoever lives by the sword dies by the sword, and they chose the path of peace.