Well.... IMO I think that he understood that he couldn't make people fight for their life if they didn't think it by themselves (I hope my words are clear)
" I'm the one of the prophecies. I AM Fuer Grissa OSt Drauka. I'm the true Seeker of Truth because I'm the only one who could make the blade become white. I'm Lord Rahl and I'm searching my Mother Confessor......."