Fyodor Dostoevsky

“ When, after his conversation with Alyosha, Ivan suddenly decided with his hand on the bell of his lodging to go to Smerdyakov, he obeyed a sudden and peculiar impulse of indignation. He suddenly remembered how Katerina Ivanovna had only just cried out to him in Alyosha's presence: "It was you, you, persuaded me of his" (that is, Mitya's) "guilt!" Ivan was thunderstruck when he recalled it. He had never once tried to persuade her that Mitya was the murderer; on the contrary, he had suspected himself in her presence, that time when he came back from Smerdyakov. ”

“ If I don't dare kill Smerdyakov now, life is not worth living!"
Ivan did not go home, but went straight to Katerina Ivanovna and alarmed her by his appearance. He was like a madman. He repeated all his conversation with Smerdyakov, every syllable of it. He couldn't be calmed, however much she tried to soothe him: he kept walking about the room, speaking strangely, disconnectedly. At last he sat down, put his elbows on the table, leaned his head on his hands and pronounced this strange sentence: "If it's not Dmitri, but Smerdyakov who's the murderer, I share his guilt, for I put him up to it. ”

“ Smerdyakov conceded.
Ivan took off his coat and threw it on a bench with trembling hands. He took a chair, moved it quickly to the table and sat down. Smerdyakov managed to sit down on his bench before him.
"To begin with, are we alone?" Ivan asked sternly and impulsively. "Can they overhear us in there?"
"No one can hear anything. You've seen for yourself: there's a passage."
"Listen, my good fellow; what was that you babbled, as I was leaving the hospital, that if I said nothing about your faculty of shamming fits, you wouldn't tell the investigating lawyer all our conversation at the gate? ”