What makes old age hard to bear is not the failing of one's faculties, mental and physical, but the burden of one's memories.
I can only guess that it made the world he went back to...strangely without meaning. Though he lived in it, though he even enjoyed it, it remained utterly remote. I think it had lost sense for him. In his heart was the reflection of a lovely dream that he could never quite recall.
Everyone had some defect, or body or of mind: he thought of all the people he had known (the whole world was like a sick house and there was no rhyme or reason in it), he saw a long procession, deformed in body, warped in mind, some with illness of the flesh, weak hearts or weak lungs, and some with illness of the spirit, languor of will, or craving for liquor. At that moment he felt a holy compassion for them all. …The words of the dying God crossed his memory: Forgive them, for they know not what they do.