Gorky wrote the most tender moment, I want to know the meaning of the last sentence.

After reading the original text, it is also the first time to learn.

I feel that the sentence "I thank her-I am sincere" should be viewed in connection with the "thank you" said by the woman.

The article quoted a woman as saying, "Yes, if I were your wife ... thank you". These words have no deep meaning, even give people a sense of incoherence, and the "thank you" should be polite and polite. In contrast, the "thank you" of "I" is an echo of the other person's words on the surface, but it is actually "sincere" because she makes "I understand a truth: life is not like a book at all.