"[Aglaya's] pretty, prince, isn't she?"
"Most wonderfully so," said the latter, warmly, gazing at Aglaya with admiration. "Almost as lovely as Nastasya Philipovna, but quite a different type."
All present exchanged looks of surprise.
"As lovely as who?" said Mrs. Epanchin. "As Nastasya Philipovna? Where have you seen Nastasya Philipovna? What Nastasya Philipovna?"
"Gavrila Ardalionovitch showed the general her portrait just now."
"How so? Did he bring the portrait for my husband?"
"Only to show it. Nastasya Philipovna gave it to Gavrila Ardalionovitch today, and the latter brought it here to show to the general."
"I must see it!" cried Mrs. Epanchin.
"He is a nice fellow, but a little too simple," said Adelaida, as the prince left the room. (1.7.11-19)
Oh, Myshkin. He comes to these people's house and immediately puts both feet entirely into his mouth. The early chapters really make him look like he's totally non-functional, right? How is this the same character who later insightfully begs Lebedev to keep secret General Ivolgin's theft?