Kosh:     But there is a price to pay.  I will not be there to help you when
          you go to Z'Ha'Dum.

Sheridan: You already said, if I go to Z'Ha'Dum, I'll die.

Kosh:     Yes, now.

--From the Babylon 5 episode, "Interludes and Examinations,"
  by J. Michael Straczynski