There are some hours of human experience so intense with suffering that they return, again and again, living themselves over in the memory, arising in the small hours of the night—haunting specters of pain, meeting us unexpectedly in an unguarded moment of solitude to open and reopen the wounds they have left, following us on through the years with a recurring vindictiveness of pain almost as keen as when it was first inflicted. Joy, happiness, exaltation of spirit, return only in new guises; t............