अप्रकाशोऽप्रवृत्तिश्च प्रमादो मोह एव च।तमस्येतानि जायन्ते विवृद्धे कुरुनन्दन॥
aprakāśo ’pravṛttiś ca pramādo moha eva catamasy etāni jāyante vivṛddhe kuru-nandana
Word by word
The verse says
Darkness, inactivity, carelessness and confusion — these appear, Arjuna, when heaviness has grown strong.
In plain words
Four signs, and the first is the absence of the first sign of clarity.
Aprakāśa — no light. Nothing coming in through the gates.
And moha, confusion, which is the one that makes this state hard to escape: the condition interferes with recognising the condition.
Where you've felt this · in health
You have read the same paragraph four times. You know you have. You read it again. At no point does it occur to you to put the book down and go outside, which is the thing that would fix it and which you will think of at about nine o'clock.
Going deeper
The last of the four signs is the one that makes this strand different from the other two.
Clarity and drive can both see themselves reasonably well. You can notice that you are being productive. Moha — confusion — means that heaviness obscures the instrument you would use to detect it. The state includes not being able to tell you are in it.
That is why the diagnostic verses matter and why they are framed as external signs rather than feelings.
It also suggests the only practical move, which this chapter does not state and which follows from it. You cannot think your way out of a state that has disabled the thinking. What works is something decided in advance and physical — the walk, the window, the arrangement to meet somebody — because it does not require the part of you that is currently not available.