The word "church" which turned up over and over again among Jubal 's words gave him knotty difficulty ; there was no Martian concept to match it - unless one took "church " and "worship " and "God" and "congregation" and many other words and equated them to the totality of the only world he had known during growing waiting & & & then forced the concept back into English in that phrase which had been rejected ( by each differently ) by Jubal , by Mahmoud , by Digby .