Kokoro, by Natsume Soseki (paragraph #753)

「何だかそれは私にも解らないが、自殺する人はみんな不自然な暴力を使ふんでせう」

translation

"I don't know why, but everyone who commits suicide uses unnatural violence."

kanji (pronunciations & definitions)
: what (なに), what (ナニ), you-know-what, you-know-what, that thing : I (わたし), me, I (あたくし), I (あたし), I (アタシ) : solution (of an equation, inequality, etc.) (かい), root (e.g. of a polynomial), solution (to a given problem), answer, explanation 自殺: suicide (じさつ)
不自然: unnatural (ふしぜん), artificial, affected, strained 暴力: violence (ぼうりょく), mayhem 使: messenger (し), police and judicial chief (Heian and Kamakura periods), klesha (polluting thoughts such as greed, hatred and delusion, which result in suffering)

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