In the Avatamsaka Sutra, the image of "Indra's net" is used to describe the interconnectedness of the universe:
“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 infinitely in all directions. In accordance with the extravagant tastes of deities, the artificer has hung a single glittering jewel in each "eye" of the net, and since the net itself is infinite in dimension, the jewels are infinite in number. There hang the jewels, glittering "like" stars in 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 there is an infinite reflecting process occurring.”
At that time celestial king Shakra-Indra, imbued with the power of the Buddha, surveyed all the hosts of celestial beings of the thirty-three heavens, and spoke in verse, saying:
“I am conscious of the spheres of all Buddhas
In all times being all equal
As their lands form and disintegrate:
They see all by enlightened spiritual powers.
The Buddha body is vast and all-pervasive;
Its ineffable form, incomparable, aids all beings,
The radiance of its light reaching everywhere:
This path Universal Fame can observe.
The Buddha’s great compassionate ocean of techniques
Has been utterly purified by past eons of practice
And guides sentient beings without bound:
Jewel Topknot has realized this.
I contemplate the ocean of virtues of the King of Truth,
Supreme in the world, having no peer,
Producing an immense sense of joy:
This is the liberation of Jewel Light.
The Buddha knows the sea of sentient beings’ good works,
Various excellent causes producing great blessings;
All these he causes to be manifest:
This is seen by Topknot of Joy.
The Buddhas appear in the ten directions,
Everywhere throughout all worlds,
Observing the minds of beings and showing how to tame them:
Right Mindfulness realizes this path.
The vast eye of the Buddha’s wisdom-body
Sees every particle of the world
And reaches in the same way throughout the ten directions:
This is the liberation of Cloud Sound.
The enlightening practice of all Buddhists
The Buddha shows in a single hair pore,
Infinite as they are, all complete:
This is seen clearly by Mindfulness.
All the pleasant things of the world
Are born of the Buddha —
The virtues of the Buddhas are supreme, unequalled:
This liberation Flower King enters.
If one thinks of a bit of the Buddha’s virtue,
The mind concentrating on it for even a moment,
The fears of the evil ways will be banished forever:
Wisdom Eye profoundly realizes this.
Great spiritual powers within the state of tranquility
Universally respond to all minds, extending everywhere,
Causing all doubt and confusion to be cut off:
This is the attainment of Light.”
The world is like an infinite giant web, all interdependent on itself.
Every atom is like a droplet of water, like a perfect jewel closely stuck with all the other.
The body appears to be separated from the tree in front of him. But in fact they are intimately interconnected through the ground and air. They are connected even more through the fundamental ground of all atoms that are mergeing, through the emptiness.
Tiny reflections (interfaces) of the unaware emptiness that argues with itself which is better, evolved, more important.
Those reflections can be a spontaneous game through which emptiness realizes itself — they become an important tool, or they can continue to fool themselves that they exists separatedly and independently.
Every reflection becomes of great use.
This is Buddha, power, compassion, wisdom, infinite complete and indestructible Vajra.
Emptiness is the ground of it all.