Supplementary explanation: color, appearance, surface, phenomenon. Color is empty, and empty is color, which means empty on the outside and empty on the outside. Further explanation, the exterior is empty, the appearance is empty, the interior is the foundation, and the essence is the foundation. When people look at things, when they are confused, they should look at the essence and content, so that they will not be confused by the surface and phenomena, look at people and look at the essence. The connotation and essence of Heart Sutra is philosophy, that is, Prajna (wisdom).
From the source
Color and space are one. Color is produced or illumined by the emptiness of "karma"; All colors are produced or transformed from emptiness through certain "karma and combination"; In other words, color is a representation or representation of emptiness under certain causal conditions. Color comes from the air; All colors are empty. And emptiness is the origin or essence of color.
All colors can return to nature, that is, to emptiness. Color (or sentient beings) returns to emptiness or origin, which is Buddha.
Extended data
Buddhism's theory of color space comes from the Prajna Paramita Heart Sutra: after a long time of observing the Bodhisattva, I have gone deep into Prajna Paramita, seeing that the five aggregates are empty, and I have done everything. Buddhist relics, color is empty, empty is color, color is empty, empty is color, and it is the same when you think about it. The relic is the empty phase of all laws, which is neither born nor destroyed, neither polluted nor clean, nor increased or decreased.
Therefore, there is no color, no thought, no body and mind, no sound, no fragrance, no touch, no vision, even no conscious world, no ignorance, no ignorance and no old age in the air. Without suffering, Tao will be destroyed, without wisdom, there will be no gain.
The most important book of Mahayana Buddhism, Prajna Paramita Heart Sutra, is an important principle of Mahayana Buddhism. This is an important idea of Buddhism. Simply put, color refers to all things that are visible or invisible, and these phenomena are caused by cause and effect. Empty is the essence of things, and everything starts from scratch.
The famous Buddhist saying "color is emptiness, and emptiness is color" contains profound philosophical thoughts. Most people, including scholars, like to make fun of it, thinking that color refers to women and emptiness is nothingness or nothingness. He said that monks saw through the world of mortals and regarded women as nothingness or nothingness, so they became monks. In fact, color is not feminine, and emptiness is not nothingness.
References:
Baidu encyclopedia-color is empty, color is color.