Re: A Niner Watches Babylon 5 (NO spoilers, please)
Suffice it to say that Lennier's account is a simplification.
And more to the point, there is a much more scientific explanation to be deduced later on. I don't believe in souls either, but once you get the whole story, it'll make sense.
Yada, yada, yada. Blah, Blah, Blah.