LOST Pre-Game: “What Kate Does”

See, we don’t necessarily know that Jacob and Silas have the same abilities that work in the same way. While Silas can appear as another (at this point, always somebody who died), Jacob might actually have to use a body. (Which gives us the maddening possibility that both of them were Christian at one point or another.) What if the temple dwellers used the spring to heal his wounds, and then drowned him so that Jacob could inhabit his body?