Fyodor Dostoevsky? Prince Myshkin? Constance Garnett? Henry Carlisle? Olga Carlisle? Apocryphal?

Question for Quote Investigator: A major literary figure once wrote about the connection between children and spiritual health. Here are two versions:
(1) The soul is healed by being with children.
(2) Through children the soul is healed.
This remark has been attributed to the acclaimed Russian novelist Fyodor Dostoevsky, but I have never seen a solid citation. Would you please help me to precisely locate the statement in Russian and English?
Reply from Quote Investigator: Fyodor Dostoevsky published the novel Идиот (“The Idiot”) serially between 1868 and 1869. An English translation by Constance Garnett appeared in 1913. During one scene in chapter six the main character Prince Lev Nikolayevitch Myshkin spoke about the children of a village and their schoolteacher Jules Thibaut. Boldface added to except by QI:1
At first he used to shake his head and wonder how it was the children understood everything from me and scarcely anything from him; and then he began laughing at me when I told him that neither of us could teach them anything, but that they can teach us. And how could he be envious of me and say things against me, when he spent his life with children himself! The soul is healed by being with children.
Below is the passage in Russian as it appeared in a 1973 edition of Идиот (“The Idiot”) from the U.S.S.R. Academy of Sciences:2
он сначала всё качал головой и дивился, как это дети у меня всё понимают, а у него почти ничего, а потом стал надо мной смеяться, когда я ему сказал, что мы оба их ничему не научим, а они еще нас научат. И как он мог мне завидовать и клеветать на меня, когда сам жил с детьми! Через детей душа лечится.
Below are additional selected citations in chronological order.
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