Ok.. this is my first post here so hi! /forums/images/icons/grin.gif
****SPOILERS*****
Im not 100% sure, as its been a while since I read the trilogy, and it may be a spoiler if you haven't read the Psi corps books but I am sure in one of them, the 2nd maybe, you find out that Kevin Vacit had a piece of a Vorlon in him, given to him from his mother in the first book. So this would make him extremely strong and it also hid his telepathic abilities from everyone thus he was able to be the director of psi-corps, something a telepath was not meant to be(at the time).
I hope that made some sense to people! /forums/images/icons/tongue.gif