Board Thread:Warhammer 40k General Discussion/@comment-12.227.32.154-20150120202758/@comment-28917471-20150225220533

Why should he heal? The Emperor fought Horus, while the corrupted Primarch was possessed by the Chaos Gods. The damage that the Chaos Gods did to the Emperor is incurable (this is just a theory, yet very reasonable and strong one).

The second thing is that the Emperor used almost all of his strength to erase Horus from existence, while at the same time he was empowering the Astronomican (can you imagine how powerful the Emperor is if he could do both of those things at once?!).

So in the end, the Emperor was on the brink of death. Weak from his battle with Horus and badly wounded (and when I say that he was badly wounded, I mean that Horus had his most inner organs removed!).

In this state the Emperor was put on the Golden Throne. Again, why would he be able to heal from this kind of battle? Maybe 10,000 is not enough for him to heal from that battle? Maybe a great portion of his strength is trapped in the Warp?