Marder formulates the paradox of “excessive heat” that, on the one hand, signals the ardency of faith and the love of God and, on the other, the effect of sin configured as ariditas (dryness), undoing viriditas (the greening green, a self-refreshing power of creation). The difference between the two kinds of excessive heat is folded into the material distinction between the woods and wood: while timber is dry and ready to go up in flames, living trees are anything but inert matter ready to be incinerated. Paradoxically, though, the woods themselves are ablaze; they are heat, which Hildegard associates with spirit. In them, solar energy is not only captured and detained but perpetually transformed in an ongoing elemental conversation with water, the earth, and the atmosphere.

Michael Marder is IKERBASQUE Research Professor in the Department of Philosophy at the University of the Basque Country (UPV-EHU), Vitoria-Gasteiz, Spain. His writings span the fields of phenomenology, political thought, and environmental philosophy.

Video and full transcript here: https://cswr.hds.harvard.edu/news/2019/09/26/ardencies-st-hidegard-blazing-plants

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