Board Thread:Warhammer 40k Novels/@comment-27376167-20151210113237/@comment-26420219-20160415220121

@Commander Kazugeta You need to have a soul-resonnance in the Warp to be able to use psychic powers, Telepathy being one of them. The Tau are unable to channel the energy of the Warp as they lack this soul-resonnance, which is also (as far as we know it) the reason why they are immune to the corrupting touch of Chaos.Therefor no Telepath ( even a Primarch) could talk to the Tau in that manner. In the same way Chaos wouldn’t have noticed them if it hadn’t been for their territorial expansion and interaction with the Imperium or O’Shovah discovery of the temple on Arthas Moloch.