Je reviens à ta question initiale. J'ai désormais le livre de Kilby. Voici le paragraphe qui te concerne :
"Professor Tolkien talked to me at some lenght about the use of the word "holy" in The Silmarillon. Very specifically he told me that the "Secret Fire sent to burn at the heart of the World" in the beginning was the Holy Spirit (27). He described his problem in depicting the fall of mankind near the beginning of the story. "How far we have fallen!" he exclaimed - so far, he felt, that it would seem impossible even to fnd an adequate prototype or to imagine the contrast between Eden and the disaster which followed." (p. 59)
La note 27 (p. 84) dit : "Facing the Balrog in their close combat at the end of the journey through Moria, Gandalf said, "I am a servant of the Secret Fire" (I, 429)."