“Always Jeff knew, sure, Melanctha was wrong in what she had said that night to him, but always Melanctha had had deep feeling with him, always he was poor and slow in the only way he know how to have any feeling. Jeff knew Melanctha was wrong, and yet he always had a deep doubt in him.”
Stein, Gertrude. “Melanctha.” Three Lives. Dover Publications, New York. 1994. p 102. Print.
By hearing Jeff (through the narrator) repeat that he knew “Melanctha was wrong,” we can better grasp his doubt.