"As I Lay Dying" by William Faulkner- What is the motive for Darl's insanity?

Darl possesses the special ability to see into other people's minds in consequence of his mother's lack of recognition; his insaneness is actually a reflection of everybody else's mind since he reaches a point where he becomes everyone but himself. In his speech: "I don't know what I am. I don't know if I am or not. Jewel knows he is, because he does not know that he does not know whether he is or …

…family members will bring a stronger sense of self to Cash. never figure out who he truly is. The insight he possesses over the rest of the characters is not his blessing but his doom because its origin is the negative lack of love from his mother. Because this is the root of Darl's problem it is possible that there is no salvation for him, not even isolation will get rid of his personality problem.