"unspeakable" appears frequently in Buddhist scriptures, which mainly has two meanings, one is literal and the other is describing a lot.
As for beyond speculation, unspeakable truth, this statement has been declared in the classics:
"Dabaojijing", Volume 22, Solemn Meeting of Armor: Sound and words can't go in the right direction, you should know the true meaning, and there is no line to follow. True meaning has no sound, no words, and exceeds the number of languages, so it is called true meaning.
The book "The Classic of the Great Treasure" won the Le Chi Conference in 92: For example, the taste of sugarcane was not separated from the skin section, nor from the skin section, but from the winning taste. Skin festival is like the world, and righteousness is better than taste. So we should abandon empty talk and think about the real meaning.
Shurangama Sutra Volume IV: True and subtle silence is the cause of nirvana. Speaker, delusion, delusion, life and death. Great wisdom and true meaning come from people who listen more. Great wisdom, listening, kindness and righteousness, not good at words.
Volume 3 of the Lengga Sutra: I call it two kinds of theories: being strict and strict, the speaker teaches the son, and the disciple is the practitioner.
"On the Buddhist Scriptures of Han Dynasty" Volume 6: What the Buddha said came out of the world, and when he came out of the world, he was speechless, his words were broken and his heart was destroyed.
Shurangama Sutra Volume II: refers to the first meaning. The sacred music said the first meaning, but what was not said was the first meaning.
"Mahayana Baoyun Jing" Volume 6: Assume that the law in the world is not the first meaning, although it is not persistent; Suppose Buddhism is not the first meaning, although it is not persistent; Suppose bodhi is not the first meaning, but the one who gets bodhi without adhering to it. A good man, speaking under a pseudonym, whose name is measured, is called the truth of the world, and has no first meaning in the law of the world; Although, if you die, you can't say the first meaning.
The Tripitaka, Volume 52, Bodhisattva Tibetan Society: Tathagata speaks for all sentient beings according to secular truth. If all sentient beings are taught by this statement, they should not be interested.
In Volume XVI of Hua Yan Jing, Xu Mi praised: As the name implies, Xiao Zhi's false separation is an obstacle, not self-centered.
"Dabao Ji Jing" Volume 90, Youbo's farewell: If you lure children with your empty fists, it means that something makes them happy, but you can't see anything with your open fist, and the children will cry here again.
If the Buddhas are incredible, they are clever in accommodating all beings, ignorant of the law, and stand under a pseudonym.
"Hua Yan Jing" Volume 52, Tathagata appears: Tathagata uses various metaphors to say all kinds of things, and no metaphor can say this way. Why? The mind has no way out and doesn't think. The buddhas and bodhisattvas obey the hearts of all living beings and make them happy, which is a metaphor, not the truth.
"Hokkekyo" Volume 1 is convenient: Buddhas can speak as they please, which is difficult to understand. So what? I use countless conveniences, all kinds of karma, all kinds of metaphors, all kinds of words, all kinds of remarks, which are beyond the understanding of Buddhism, and only the Buddha can know.
Infinite Righteousness Sutra: From the Buddha's point of view, all laws are unspeakable, so what is it? There are various views that all beings have different sexual desires and sexual desires. ..... What was said at the beginning, in the middle, and later is the same thing, but the meaning is different.
The Great Prajna Sutra Volume 81 tells the son of heaven: Buddha said: I didn't say a word here, and you didn't hear it. .................................................................................................................................................................................
"Lengga Sutra" Volume 3: Buddha's words: One night, you get the most Tao, and even one night is like nirvana. I didn't say a word in the middle, but I did.
Ou Yi's Reading Tibet and Knowing Tianjin Volume 22: Buddha's Word: I have nothing to say, because I have nothing to see in various laws. You can't even say Prajna.
Diamond Sutra: If someone says Tathagata, it is blasphemy against the Buddha and can't explain what I said. Xubodhi, the speaker, can't say anything, it's a famous saying.
"Hokkekyo" Volume 1 Convenient Goods: Since I became a Buddha, I have been giving lectures for various reasons, metaphors and countless conveniences, guiding all sentient beings to leave others behind.
"Diamond Sutra": There is no fixed method, named Aunt Doro, Sanwei and Sanbodhi, and there is no fixed method for Tathagata. Why? As the Tathagata said, everything is undesirable, unspeakable, illegal and not illegal. So what? All saints and sages are different because of inaction.
"Nirvana Sutra" Volume 20 "Baby's Craft": Although the Tathagata gave lectures on various methods for all sentient beings, he did not say anything. Why? There is a saying that there is a law in the name, and the Buddha is not a promising person. There is nothing to say.
Sakyamuni's Buddha Reward Law, Volume I: If this law cannot be used, it cannot be used. How to use it when it can't be sent out today?
"Jue Yuan Jing" says in the volume: Practice Dorothy as the moon. If you see the moon again, you will realize that the mark is not the moon after all. All the words of the Tathagata are revealed to the Bodhisattva, and so is it.
"Shurangama Sutra" Volume II: You'd better listen to the Dharma with your heart. This Dharma is doomed and must be legal. If a person shows the moon with his fingers, he should look at the moon because of his fingers. If you look back at the moon, is this person the death of the moon and the finger?
A?vagho?a's Mahayana Belief Theory: This is all the laws. From then on, it is neither color nor heart, nor wisdom nor knowledge, nor being nor being. And the speaker should know that Tathagata is skillful and convenient, and guide all beings with words. Its main purpose is to leave the mind and return to the truth. In order to read all the laws, the mind is born and dies, which is not practical but wise.
"The Six Ancestors' Tanjing Drinks": If I say that I have laws and I have people, that's nine Niu Yi hairs, but I'll explain you with the party, and I'm called Samadhi.
In the Book of Vimalakīrti, the audience: the words and expressions are out of phase. So what? The liberator is nothing more than two rooms, and writing is not. So Sharifutsu has nothing to say.
"Hua Yan Jing" Volume 24 "Ten Prescriptions": Everything is false without the words of all beings. Although you don't follow the language, you can't say nothing.
There are 100 volumes in Dabao Jing. It is to be argued that all wise men assume that there is no writing, but there is no writing, so the law does not hinder writing.
Dabao Ji Jing, vol. 102, with good location and good intentions: anyone who listens is convinced.
..... If you listen to it, when you know that you live in three kinds of connections, what are the three kinds of connections? See me bound, see all beings bound, see the law bound. Son of heaven, if there are no three kinds of people who are bound and listen to the law, how can three networks live together? One does not look at himself, does not distinguish, does not miss, and does not prove knowledge; Second, if you don't see the speaker, you won't know. If you don't miss it, you won't know. 3. No words, no differences, no thoughts, no testimony.
The third volume of Shurangama Sutra: Those who live and die are known, and those who don't live and die are wise. Again, no obstacle is wisdom, and all obstacles in the realm are knowledge. Again, the combination of three things and convenience is knowledge, without convenience, self-nature is wisdom. Over and over again, the phase is knowledge, and the phase is not wisdom.
"Dabaojijing" Volume 37, Bodhisattva Tibetan Society: born from the realm, it is known; Born of meaning, it means knowing; Born of separation, it is called knowledge.
Nothing, nothing, nothing, nothing, nothing is wisdom. People who know what they are talking about will live in peace.
Why? The law of inaction, knowing can't be done. If you can do inaction, it is called wisdom. What is born, sick and dead is called knowledge; Being immortal and having nowhere to live is called wisdom.
Hua Yan Jing (Volume 40, 10) has a clear product: what you get now is that you learn from others with wisdom, but you can't learn from others. The body is real and the eyes are clear.
The Great Treasure Sutra, Volume 52. Bodhisattva Tibetan Society: If it is in the scriptures, it should be said by the Tao; if it is said, the Christian name is not correct; If it is said in the scriptures that it is fruit, then the name of preaching is righteousness. If the scriptures say secular truth, they can't be vindicated; It is said that winning righteousness is the name of righteousness. If there is anything in the classics that says that you are tired of life and death and enjoy nirvana, you can't be right; If there is a declaration that there is no dichotomy between life and death, it is called righteousness. If there are extensive sentences in the classics, they can make all beings enthusiastic and indescribable; If there is a declaration that words and hearts are ashes, it is a name.