Huayan teachers used the image of the god Indra’s net, a jewel at every knot, each reflecting every other and the reflections in them, to illustrate how all phenomena contain and depend on one another without obstruction. Fazang is also said to have demonstrated it with a candle in a hall of mirrors.
Indra’s net
A jewelled net in which each jewel reflects all the others: the Huayan image of the interpenetration of all things.
Also: Indra’s net, Indra’s jewelled net