Lecture at Notre-Dame

'Music may be adapted to the sacred in several ways. First of all, there is liturgical music, which follows the structure of the Office and finds its significance only in the Office.
Then comes religious music - and this term covers a vast field of epochs and diverse lands, diverse esthetics.
Finally, there is that break towards the beyond, towards the invisible and unspeakable, which may be made by means of sound-colour, and is summed-up in the sensation of bedazzlement.

This will be the order of my reflection:
1) Liturgical Music
2) Religious Music
3) Sound-colour and Bedazzlement'