दृष्ट्वेदं मानुषं रूपं तवसौम्यं जनार्दन।इदानीमस्मि संवृत्तः सचेताः प्रकृतिं गतः॥
dṛṣṭvedaṃ mānuṣaṃ rūpaṃ tava saumyaṃ janārdanaidānīm asmi saṃvṛttaḥ sa-cetāḥ prakṛtiṃ gataḥ
Word by word
The verse says
Arjuna said: Seeing this human form of yours, gentle again, Krishna, I have come back to myself. My mind is my own again and I am as I was.
In plain words
Prakṛtiṃ gataḥ — returned to my own nature.
He says he has come back, which means he knows he had gone.
And the thing that brought him back was not an argument. It was a familiar face.
Where you've felt this · in health
You come round after an operation and for a while you are not anybody in particular. Then somebody you know is standing by the bed, saying your name. The pieces come back in an order you have no say in. Then you are yourself again.
Going deeper
Coming back to yourself is a real event with a describable mechanism, and the chapter has just shown the whole of it.
Arjuna went somewhere he could not stay. What returned him was not insight, and not an exercise in steadiness — it was the sight of a face he knew. The entire recovery runs through relationship, which is what the previous ten verses have been establishing.
That is the answer to a question the chapter raised at verse 24, when all his practised steadiness failed him at once.
It is also the chapter's argument in miniature. You cannot be equal to the universal form; nobody is, and no amount of preparation changes that. What you can have is somebody to come back to, in a shape you can look at, which is exactly what the last four verses are about to recommend.