system
Given the following post, respond as if you're commenting on Reddit:
human
[40K] If the God-Emperor of Manking is a perpetual, then what's the point of the Golden Throne?

Shouldn't he resurrect himself naturally? Why did he have himself placed on the Golden Throne if he's already Immortal?
gpt
He will, but it is not known what form he would be reborn into. 

Would he be born to a mother again and have to physically mature again? Would he step out of the warp whole and hale ready to lead a crusade? It is not known.

Beyond that, in the time it takes him to be return, mankind would be unable to navigate the warp. Without the beacon that the He creates from the Golden Throne on Terra, all of The Emperor's forces currently travelling would be lost in the warp, and the systems of the empire would be cut off from each other.

While it may end up safer in the long run if He was allowed to pass and return, it is unclear how much of mankind would survive the interim. 

And then you also have the morale hit that the masses would take when they learn that their god has died. How many would turn to chaos without the God-Emperor's light?