 Eriugena cites almost 25% of Gregory of Nyssa’s De Imagine—as he refers to the De hominis opificio—in the Periphyseon. Gregory of Nyssa’s and Basil the Great’s accounts of creation provide the missing pieces, and complements the cosmology Eriugena derives from the partial Latin translation of the Timaeus. Basil’s Homilies on the Hexaemeron provide him with a model for reading Genesis literally.