Kokoro, by Natsume Soseki (paragraph #463)

「それが解らないのよ、あなた。それが解る位なら私だつて、こんなに心配しやしません。わからないから氣の毒でたまらないんです」

translation

"You don't understand that, dear. If you could understand that, then even I wouldn't worry so much. I feel sorry for you because you don't understand."

kanji (pronunciations & definitions)
: solution (of an equation, inequality, etc.) (かい), root (e.g. of a polynomial), solution (to a given problem), answer, explanation : throne (くらい), crown, (nobleman’s) seat, government position, court rank : I (わたし), me, I (あたくし), I (あたし), I (アタシ) 心配: worry (しんぱい), concern, anxiety, uneasiness, fear
: poison (どく), toxicant, harm, evil influence, ill will

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