Anna Karenina by Part 2 Chapter 9 Page 9

For an instant her face fell, and the mocking gleam in her eyes died away; but the word love threw her into revolt again. She thought: “Love? Can he love? If he hadn’t heard there was such a thing as love, he would never have used the word. He doesn’t even know what love is.”

“Alexey Alexandrovitch, really I don’t understand,” she said. “Define what it is you find...”

“Pardon, let me say all I have to say. I love you. But I am not speaking of myself; the most important persons in this matter are our son and yourself. It may very well be, I repeat, that my words seem to you utterly unnecessary and out of place; it may be that they are called forth by my mistaken impression. In that case, I beg you to forgive me.