“The Net of Indra is a profound and subtle metaphor for the structure of reality. Imagine a vast net; at each crossing point there is a jewel; each jewel is perfectly clear and reflects all the other jewels in the net, the way two mirrors placed opposite each other will reflect an image ad infinitum. The jewel in this metaphor stands for an individual being, or an individual consciousness, or a cell or an atom. Every jewel is intimately connected with all other jewels in the universe, and a change in one jewel means a change, however slight, in every other jewel.”

From The Enlightened Mind by Stephen Mitchell.

“Far away in the heavenly abode of the great god Indra, there is a wonderful net which has been hung by some cunning artificer in such a manner that it stretches out indefinitely in all directions. In accordance with the extravagant tastes of deities, the artificer has hung a single glittering jewel at the net’s every node, and since the net itself is infinite in dimension, the jewels are infinite in number. There hang the jewels, glittering like stars of the first magnitude, a wonderful sight to behold. If we now arbitrarily select one of these jewels for inspection and look closely at it, we will discover that in its polished surface there are reflected all the other jewels in the net, infinite in number. Not only that, but each of the jewels reflected in this one jewel is also reflecting all the other jewels, so that the process of reflection is infinite. The Hua’yen school [of Buddhism] has been fond of this image, mentioned many times in its literature, because it symbolizes a cosmos in which there is an infinitely repeated interrelationship among all the members of the cosmos. This relationship is said to be one of simultaneous mutual identity and mututal intercausality.”

~ Francis H. Cook, Hua-yen Buddhism: The Jewel Net of Indra