>page 9, The Chambers of Purity
>The Chapter’s legends tell that a great evil lies entombed amongst the roots of Mount Anarch. Was it for this reason that Titan was chosen as the Chapter Planet for the Grey Knights, so that the entrammelled evil should ever have watchful and incorruptible guardians? Or did something defeat Malcador’s defences and creep onto Titan during the moon’s time in the Warp? The truth lies only in the Iron Grimoire – the Grey Knights’ only written record of their founding, a tome inked with the blood of saints and bound in screaming Warp-metal. Only a Supreme Grand Master is permitted to read this tome, and it would be unthinkable for one to share its contents with his own Battle-Brothers, let alone outsiders.
>page 10, The Banishment of Daemons
>Alas, if true names are a Grey Knight’s surest weapon against a Daemon, they are also the hardest of all to acquire. As with all things daemonic, a true name is borne of the Warp, and its reflection in the minds and tongues of mortal men is as shifting and mutable as the beast to whom it relates. So it is that in the candlelit chambers of the Grey Knights’ Augurium, a veritable army of ebon-cowled scribes toil in shadow, endlessly sifting through the visions reported by the Chapter’s Prognosticars, searching for clues to the ever-changing true names. It is a long and dangerous process, for no scribe can ever be trusted with more than a fragment of a true name, lest he become corrupted by the power it contains. Thus, each scintilla of lore is inscribed onto a blessed scroll in sigils of the scribe’s own blood – mere ink cannot cage such knowledge. Each is then presented for collation and interpretation by one of the Chapter’s Senior Librarians and, in turn, bound into one of the blessed grimoires within the Sanctum Sanctorum.
muh sisters