The meditation of simply feeling "grateful" with the heart can be said to be the very state described by Dzogchen, as follows:

"There is no concept that can define what is as it is." (omitted) "Since everything is already accomplished, one must abandon the disease of effort and remain in the state of perfect being, which is samadhi." - "The Teachings of Dzogchen" (by Namkhai Norbu).

In Esoteric Buddhism, or Dzogchen, the three aspects of "body," "speech," and "mind" are often discussed. These are interpreted slightly differently depending on the school, for example, as "body, speech, and mind," or "action, words, and will," or even "body, energy, and consciousness."

However, these are merely for explanation, and in my current experience, I feel that "they are already integrated."

What does this mean? In the past, I considered each of these three elements separately. However, this (sixth-dimensional) higher self transcends those three elements. Therefore, the three elements are no longer separate, they are integrated to the point where they are invisible, and they are integrated.

In a rough sense, this is samadhi, but the word "samadhi" is used so often that it has become unclear what it actually means. Nevertheless, if one were to express it in words, there is no doubt that it is samadhi.

In the practice of Esoteric Buddhism, there are opportunities to confront each of the three aspects of body, speech, and mind. For example, one might experience energetic mantras or seek the state of stillness. And one experiences something like "bliss."

These elements exist individually, but at this stage, they are integrated, and it seems that they can no longer be separated as individual elements.

Even if one tries to divide them, they cannot be separated, and more than that, the "explanations of each element as words" that I used to understand can no longer be simply divided into "bliss" or "the state of stillness," and even the explanations of each element as words, while all being somewhat correct, are not complete explanations.

At this stage, it becomes clear that verbal explanations are merely convenient.

Of course, I had known this intellectually from the beginning, but even so, I have been trying to express it in words, and I thought I was managing to express it.

However, now, a sense of detachment from words has emerged, making it impossible to properly express it in words. And if that is the case, it might be the same whether one makes the effort to express it properly or simply reuses existing explanations. In either case, since there are no words that can express what is as it is, there is also the option of abandoning the effort to express it, a kind of resignation towards expression.

It has already been sufficiently described in books and words, and those who understand will understand, and those who can reach it will be able to reach it. I feel that, as a verbal expression, it is probably sufficient.

I have personally solved most of the mysteries written in books, and although there is room for interpretation because they are expressed differently, there is not much left to explore in terms of the overall direction.

Even when searching for books, there are hardly any books written that go beyond my current level, and perhaps this is the limit of what can be expressed in words. The remaining steps are to proceed as shown in Theosophy or the stages shown in Light Body, and it seems that verbal explanations are sufficient at this point.