In the episode 'ALL ALONE IN THE NIGHT'(E.11, season 2), Sheridan has a weird dream whilst being held captive onboard a Strib ship. He saw Ivanova, Garibaldi and himself feature in it and impart odd messages. Then Kosh appears and Sheridan asks him 'Why Am I Here'? The Vorlon replies 'You Were Always Here'! He also asks t same thing and gets the same answer when he sees Kosh outside medlab. What did he mean by that? Is it to do with Sheridan finding out he's a 'NEXUS' when he was at Z'HA'DUM. Or is it something else?