Alyosha sensed by some sort of instinct that a character like Katerina Ivanovna must rule, and that she could only rule over a man like Dmitri, but by no means over a man like Ivan. For only Dmitri (in the long run, let us say) might finally submit to her “for his own happiness” (which Alyosha even desired), but not Ivan, Ivan could not submit to her, and such submission would not bring him happiness.
