The Huayan developed the doctrine of "interpenetration" or "coalescence" (Wylie: "zung-'jug"; Sanskrit: "yuganaddha"), based on the "Avataṃsaka Sūtra" (Flower Garland sutra), a Mahāyāna scripture. Huayan holds that all phenomena (Sanskrit: "dharmas") are deeply interconnected, mutually arising and that every phenomenon contains all other phenomena. Various metaphors and images are used to illustrate this idea. The first is known as Indra's net. The net is set with jewels which have the extraordinary property that they reflect all of the other jewels, while the reflections also contain every other reflection, ad infinitum. The second image is that of the world text. This image portrays the world as consisting of an enormous text which is as large as the universe itself. The words of the text are composed of the phenomena that make up the world. However, every atom of the world contains the whole text within it. It is the work of a Buddha to let out the text so that beings can be liberated from suffering.