c. 1098 – 17 September 1179), also known as the Sibyl of the Rhine, was a German Benedictine abbess and polymath active as a writer, composer, philosopher, mystic, visionary, and as a medical writer and practitioner during the High Middle Ages.[1][2] She is one of the best-known composers of sacred monophony,
"But the light I see is not local, but is everywhere, and brighter far than the cloud which supports the sun. I can in no way know the form of this light, just as I cannot see the sun’s disc entire. But in this light I see at times, though not often, another light which is called by me the living light, but when and in what manner I see this I do not know how to say. And when I see it all weariness and need is lifted from me, and all at once I feel like a simple girl and not like an old woman."
- Hildegarde of Bingen (1100–1178) In Pitra, Analecta sacra, VIII