What is the meaning of "nothing" in Buddhist language?

Buddhism advocates that everything in the world and the human body are made up of earth, water, fire and wind. "Four" refers to soil, water, fire and wind, and also refers to firmness, humidity, temperature and movement. It is called "big" because it is ubiquitous in any object, that is to say, the "big four" are the inherent physical properties of every object, not just the land, rivers, sunshine and wind in nature. As far as the human body is concerned, the flesh and blood are big, the sweat, blood and body fluid are big, the body temperature and fever are big, and the breathing movement is big. The concept that matter (called color in Buddhism) is composed of "four great things" reflects the basic understanding of the composition of the material world by ancient Indians and is the result of the initial exploration of the universe. It belongs to simple materialism, similar to China's ancient theory of "five elements" (gold, wood, water, fire and earth). After Buddhism came into being, it followed the inherent thought of ancient India and deepened it, and put forward the idea that "everything is empty". "Emptiness" is a fundamental philosophical concept in Buddhism, which is profound and difficult to understand. Many people have misunderstood it in the past and now, and some regard "emptiness" and "being" as two opposing aspects, which are in common in front of the real world; Some regard "emptiness" as emptiness and fall into nihilism. To understand the word "empty", we must first know the source of this word. Buddhist scriptures are translated from Sanskrit, from which the word "empty" comes. In Sanskrit, Sungata (sound: Shun Ruoduo) means "sexual emptiness", which Master Xuanzang simply translates as "emptiness". The following excerpt is from Mr. Yun Si's article "On Empty Is Color". He made the origin and meaning of this empty word very clear: "Empty is called Sunyata in Sanskrit. In fact, the word Sunyata cannot be abbreviated as' empty', but should be called' empty'. Ta is a suffix here, and Sunya is the root. Of course, we can call Sun Yakong, but the "empty" in the sentence "color empty" is not Sun Ya, but Sun Yata. The word ta at the end is very different from the word Sunya in Sanskrit. Ta means nature, truth and form. Empty and empty have different meanings. ..... "This passage clearly analyzes the emptiness and emptiness. In fact, among the seven versions of the Heart Sutra found by the author, Prajna * * * is translated as "all five aggregates are empty", not all five aggregates are empty; Fayue, Wisdom Wheel, and Shi Hu all translated as "five aggregates are empty"; Fa Cheng's translation is "seeing five meanings, knowing all is empty". There is a saying in Sanskrit-Tibetan translation that "all laws are empty". It can be seen that the "emptiness" here should be understood according to the meaning of "sexual emptiness", which is an omission of "sexual emptiness". For more than a thousand years, Xuanzang's translation has gone deep into the people and spread widely. His translation is "all five meanings are empty". Of course, his translation must have his own opinions, and it would not cause misunderstanding at that time, and the explanation of the word "empty" was quite clear at that time. Only later, due to the changes of the times, the meaning of language has changed, so some people interpret the meaning according to the words and only understand the superficial meaning of the words, which has caused many misunderstandings for thousands of years. The explanation of "emptiness of nature" in "Chen Buddhism Folk Words" is: "Everything that is synthesized by many factors has its emptiness of nature, and there is no true self to be obtained." The "sex" here is not a physical attribute in the sense of physics and biology, but an independent "self" that does not depend on conditions (fate). "Self-nature" means that it is self-owned, self-made, self-determined, as it is, and truly unchanged. As long as we infer calmly and think repeatedly, we will find that everything in the world is a phenomenon produced by the joint action of many factors under certain time and space conditions, and there is no unconditional absolute single and independent "self-nature". Everything in the universe is produced by various conditions (fatalism), and everything is "fatalism" and "born by fate", that is, if the conditions for producing it are met, it will be produced and exist, and if the conditions are not met, it will not be produced. Things born of karma can't exist without karma, which is called "no self", that is, "sexual emptiness". Indian scholar Long Shu said: "Origin is sexual emptiness, and sexual emptiness is origin. Nothing in the world is not sexual emptiness. " He also said, "If things are self-sufficient, why rely on all the factors? If all factors are in harmony, what else is self-contained? " Generally speaking, being is existence, being is not emptiness, emptiness is nonexistent and emptiness is not being, so emptiness and being are opposites. In fact, "emptiness" and "being" are not only not antagonistic, but also integrated. There is space in "you", and space will not exist outside of "you", and it is not necessary to wait for the destruction of "you" to talk about space. Buddhism says "emptiness" by "being", and "being" and "emptiness" are integrated and unique. It can be seen that the emptiness mentioned by Buddhism is the emptiness of "origin", the emptiness of "karma", the emptiness without self-nature, the emptiness without all emptiness, the negation of the role of things and the emptiness of continuous transformation of things. The following sentences in the Heart Sutra are of great help to correctly explain "four are empty". "Color is not different from emptiness, emptiness is not different from color, color is empty, and emptiness is color" means that "color" (referring to all substances) is not another completely different thing from emptiness, and emptiness is not another completely different situation from color. "Color" and "emptiness" are two sides of the same thing. "Color" refers to the phenomenon of things themselves, and "emptiness" refers to the essence of things. Color (matter) itself is a kind of existence, but in terms of its fundamental nature, it is a phenomenon composed of many factors under certain time and space conditions, and there is no unconditional absolute single and independent "self-nature", so color itself is empty without self-nature. The substance with emptiness is color. The "emptiness" here refers to the "self-emptiness", not the emptiness that denies the existence of color. "Self-emptiness" is the eternal nature of all things that are caused and combined. So Zong Kaba said, "What depends on the conditions and what is empty." The sentence "emptiness is color" also shows that the concept of emptiness is based on existence, and it is meaningless to say that things like turtle horns are empty.