The 'mission' of the Astra Telepathica to 'keep the balance' originated in the messy aftermath of the Apostasy. It was the brainchild of Master Charimide, successor of the traitor Phaedrus, who recognizing the failure of the Astra Telepathica to do its plain duty in stopping Vandire, at whatever cost, resolved that that was one error that would not be repeated. In the late 41st Millenia the Agency's primary concern has become the radical factions of the Inquisitions' Ordos Malleus and Hereticus as alarming numbers of the Emperor's most trusted guardians seem to be turning to Chaos.