Relationship from the narrator with Roderick changed?

what has changed in the narrators relationship with roderick in line 226-231?

"....if in a dream, to the wild improvisations of his speaking guitar. And thus, as closer and still closer intimacy admitted me more unreservedly into the recesses of his spirit, the more butterly did i perceive the futility of all attempt at cheering a mind from which darkness, as if an inherent positive quality, poured forth upon all the objects of the moral and physical universe in one unceasing radiation of gloom.