Bear with me, I may be far off the path. I think the Ahamkara, The Fallen and Guardians all have a link somewhere. Guardians Light became corrupt after seeking too much knowledge and power from the Ahamkara. It came at a price but we don't know what price or cost. This info was lost in the Dark Age. Examples of Ahamkara in action. Consider how someone who believed in the fight for peace, and who ordinarily might behave in a non-violent manner, might come to blows with someone who threatened or challenged his notions of peace. (If the Consensus decided to eliminate the Ahamkara a Guardian effected by their "gifts" would consider this a violent action and come to blows) The mind has created a state of illusion, but it seems very real to the person in that state, and subjectivity and reality are obscured. This deeply illusory state is what can often cause people to do the strangest, oddest things, sometimes evil, and often quite out of character. All humans can - and usually do at some time in their lives - suffer from this. (Likely Guardians would never even realize they were turning into Fallen because their minds had created an illusion of them being normal) In ahaṃkāra, a state of rajas guna (agitation) predominates. This is because it identifies only with a small part of the creation (the body) and rejects everything else as "not me"; it becomes subject to a series of afflictions such as: pride, egoism, competitiveness, hate and jealousy. (All traits of the Fallen) Ahaṃkāra is the instrument of Ahaṃ (the Spirit), the principle of individuation, acting as an independent conscious entity within the impure reality - yet, it does not have consciousness of its own. Ahamkara is (actually soul/ego-soul) the instrument of the spirit (made by thought-material='dark energy' & emotion-material='dark material') for individual development of the ego-soul, like DEHA (material-body/mold) is the instrument for individual development of the ego-soul/mind. (An instrument of " Dark material") Theory: When the Fallen/Guardians were banished from The City after The Great Hunt they scoured the Cosmodrome for a new home. This is where they found the Prime Servitors. The Primes being "arbiters of life and death sensed the dying " light" but also noticed the growing "darkness" from deals with the Ahamkara. They granted them life in the form of "Ether" which they still thrive on today directly from the Primes. This is why the Fallen worship the Primes because they gave their race life when all was lost. The highest of Fallen (archon priests) are nothing but souls waiting to be restored.