Book excerpt: As the community of life on this planet experiences the anthropogenic climate crisis, what tools from faith traditions can help us meet the coming challenges? By expanding the metaphor of light within the Christian and Quaker traditions to include light’s role in ecosystems, this project develops an ecotheology of light that aims to answer this question. Cherice Bock and Christy Randazzo draw on their contexts in the Religious Society of Friends, placing the Quaker Inward Light in dialogue with the Bible, and light in Eastern Orthodox, ecological, and interdependence theologies. The Quaker ecotheology of light developed argues that Light is a vitally important and mutually translatable metaphor providing a common language that can aid humanity, reinterpreting traditions to meet this moment with spiritual grounding to transition to a just and sustainable future for the Earth, our common home. Bock and Randazzo connect this ecotheology of light with implications for Friends testimonies.