Somehow he managed to find the strength to keep going. He always assumed it was pure hatred and spite that kept him alive. The closer the first Full Moon after his bite approached, the more incensed he became. While he might have been the one to physically kill Eliza, accident or not, it wasn't his fault. She would still be alive if her father hadn't demanded they stay apart. The sickness in his mind coupled with his grief was a dangerous combination. By the morning of the Full Moon, he knew what he was going to do.