I'm asking about the Heart Sutra

It's not about something specific...; it means that if you lose your obsession, you can understand that everything in the world is like that.

When ice melts, it becomes water, and eventually it becomes water vapor, but this does not mean that the molecule called water has gone to another world. It was a delicious tea when it was in the teapot, but when you enter the triangular corner of the sink, it quickly becomes trash. However, this does not mean that the tea has become clean or dirty. Everything is caused by our biased views and obsessions, so I understand that it means let go of it.

Many people have written the modern translation of the Heart Sutra, so it might be a good idea to pick it up at a bookstore or look it up on the internet etc.

The Heart Sutra explains that “the various laws of (ko) are immortal, immortal, impure, undiminished by being the air minister (kusou).”
Your question is correct, but in the first place, the “laws” referred to here are not the phenomenal world itself that we see and hear in our daily lives. It shows a world that was seen as “sky (ku)” in Kannon Bosatsu's deep meditation. Everything exists only hypothetically due to cause and connection; books, cats, and myself are here and here, but when viewed from an empty eye, nothing exists independently. It's “absent.”
So, the ultimate state of a book, a cat, or something called oneself is nothing, whether it's something that happens, something that dies, something dirty, something pure, or something that increases.
His Holiness the Dalai Lama regarded situations that arise, perish, become pure, increase, and decrease due to causes and relationships in a phenomenal world that can be captured by the eyes of ordinary people as “secular truth.” It certainly looks like that, and it has been confirmed, so it's “true.” However, this is nothing but the truth in the world of ordinary people who are caught up in it and are disappointed.
The world reflected and heard in the eyes of Kannon Bosatsu, who grasped the state of the phenomenal world from the root (it is the content of the Heart Sutra) is simply empty, and this is called the “ultimate truth.”
Therefore, this sentence means that everything in this world that appears as the ultimate truth can only be expressed as “not ~” if I dare to put it into words. It has occurred in the eyes of ordinary people, and it has been destroyed, but in the eyes of Kannon, the same world is empty as it is.
The point lies in the duality of one world being viewed “secularly” in the eyes of ordinary people and “ultimately” in the eyes of Kannon.
Please keep up the good work.

One philosopher said, “Start with words.”
That is a mistake and “there are facts in the beginning.”
The only ultimate reality of man is the present.
First of all, people with words live only by thinking.
First, when it comes to factual humans = Buddha = enlightenment visions, the present is the only thing. That's why changes, life and death, past and future are gone, and my mind is at ease. This is because left-brained thoughts will no longer be handled.
Normally, when we look at things, we look at things through filters called thoughts and notions.
Therefore, gains and losses are born in the mind, such as life and death, increase and decrease, and purification.
Personally, it's just setting standards and discussing ideological comparisons from there.
The world of birth and death, increase and decrease, and purification is a cascass world of mentality that deals with things with thoughts and is not a real fact.
Please learn that there is a “world of facts” before thinking about words, evaluations, etc.
If you just live with current facts, you'll understand the meaning very well. (^<^)

The reason humans need to do zazen meditation is that they can awaken to a world before dealing with things, such as judging and evaluating these things. (Well, a lot of people end up thinking.)
When placed in a world separated from the world of thought through zazen, the Heart Sutra only describes exactly that.
immortal
When the mind is devoid of ideas, nothing happens or perishes in the mind.
There are only facts, and nothing of the past is there. This is because we live in a world where there is no room for human evaluations and judgments.
immaculate
Also, when living only current facts, the dirt and purification of things are not recognized.
In the first place, this is because the consciousness of impurity, purity and purification is only in a world created by human notions. Since it is far from the idea itself, it does not get dirty or purified.
no increase, no decrease
Also, there is no increase or decrease in things. Since it is a state of mind where notions are not attached (empty), the self is always in a brand new world, no matter what you see or listen to.

This mind and body always coexist with the facts of the present.
The state before opinions on increase and decrease, life and death, right and wrong, and right and wrong were added to that. For example, if you're climbing a high place with a ladder, you can't think about unnecessary things. Just do what's in front of you. There are no highs or lows, no ups or downs.

Izumi-sama

This is Kawaguchi Hidetoshi. This is my humble answer to the question.

Before “immortality, immortality, impurity, undiminished, unabated, undiminished,” it is stated that the state of existence in this world and the state of things and things is “the sky.”

A number of negative terms of “nothing” and “no” are used in the Heart Sutra to suggest this state of “emptiness,” but in other words, it is also “denial of substance.”

“Entity” (self-nature/self-phase) refers to things and things that never change forever, things that are made up of independence and self-existence, and things that occur without going through any cause or condition, or that perish without going through any cause or condition, but it is used to indicate that there is no such thing or thing, and that it is impossible is a negative term for “nothing” or “no” in the Heart Sutra.

Regarding the Heart Sutra, we have answered the following questions until now.
http://blog.livedoor.jp/hasunoha_kawaguchi/tag/般若心経

Until now, we have dealt with “immortality” in the following questions.
http://blog.livedoor.jp/hasunoha_kawaguchi/tag/不生不滅

Therefore, it is often mistaken, but don't be swept away by the strength of the negative words “nothing” or “no” in the Heart Sutra and fall into absolute nothiness if there is nothing. Certainly things exist. You and I certainly exist. However, it is important to think about what kind of state it exists. The key point is “sky and luck.” Regarding this, please also refer to a few of the humble answers to the questions below.

The question “Which is more difficult, living or dying?”
http://blog.livedoor.jp/hasunoha_kawaguchi/archives/1002992500.html

* In understanding “luck,” three main levels can be considered: first, “dependency between cause, condition, and effect,” second, “dependency between part and whole,” and third, “dependency due to being pseudonymised, hypothesized, or hypothesized due to conscious effects, conceptual effects, and thought discrimination effects.”

Kawaguchi Hidetoshi Gassho

If there's something you don't think you understand,

Please recite the Heart Sutra as many times as you like during your life.
In my long life, I'm sure I understood (depending on each capacity)! There may come a time when you think that.

However, even if you try to understand the upper side with theory, I don't think you'll ever understand it.

(Rather than to the questioner, I wrote it out of concern for other people watching this question and answer)