महाभूतान्यहङ्कारो बुद्धिरव्यक्तमेव च।इन्द्रियाणि दशैकं च पञ्च चेन्द्रियगोचराः॥
mahā-bhūtāny ahankāro buddhir avyaktam eva caindriyāṇi daśaikaṃ ca pañca cendriya-gocarāḥ
Word by word
The verse says
The five great elements, the sense of I, the intellect, and the unmanifest; the eleven senses, and the five objects the senses move among —
In plain words
The inventory of the field begins, and it is a list of parts.
Earth, water, fire, air, space. Then the sense of being someone, then reasoning, then the unmanifest ground they come out of.
Then eleven senses — five that take in, five that act, and the mind — and the five things the senses are for.
Where you've felt this · in health
You take the back off an old radio and there is a list of parts, each of which has a job. None of them is the music. Every single one is necessary for there to be music, and you can point at every one of them, and the pointing never arrives at the thing you turned it on for.
Going deeper
Reading an inventory of yourself is a strange experience, and that strangeness is the point of putting it this early.
Everything named here is on the field side of the line. The elements, obviously. The senses, obviously. And then the two that are not obvious: ahaṅkāra, the sense of being a particular someone, and buddhi, the faculty that reasons and decides. Both are listed as parts of the field — things known, not the knower.
Chapter 7 made the same move in a single line. Here it is made by cataloguing.
The effect is cumulative rather than argued. By the end of the list a reader has watched almost everything they would have called themselves get written down as equipment, and nothing has yet been said about what is left over.