"All right, so -"
He tells a very familiar story, though he tells it a bit differently. Expands more on the specifics of the war, how the empathy a jedi has was something of a double edged sword - it made them better at fighting, but at the same time, they had to feel the deaths of all of those they killed. And, worse than that, the deaths of their own men. ("It's clearer and harder to put aside when it's your friend that's dying," says the holocron, sounding a little haunted.) The danger, says Revan's holocron, is that a lot of a Force-user's power comes from strong emotion. So, in a war, jedi get to suffer all of their fellows dying, and then in a desire to save them, they rely on the strongest emotions possible - and in war, those are likely to be the darker ones.
"I think falling is different for different sorts of people. For Revan, it was like... Being cut off from the rest of the world. Being alone. Having their only inputs being from people that just blindly agreed with them, thinking that what they were doing was worth whatever price they paid. Saying 'I did what I had to' when they didn't really sit down and think about alternatives. Painting the world in black and white and ignoring the shades of grey, while condemning everyone else for only seeing in black and white.
"The most common thread I've seen for those that fall is despair. Not necessarily the kind where they think everything is lost, but the kind where they think it can't be changed. That there's only awful things in the galaxy, and the only way to win is to be better at being terrible."