यः सर्वत्रानभिस्नेहस्तत्तत्प्राप्य शुभाशुभम्।नाभिनन्दति न द्वेष्टि तस्य प्रज्ञा प्रतिष्ठिता॥
yaḥ sarvatrānabhisnehas tat tat prāpya śubhāśubhamnābhinandati na dveṣṭi tasya prajñā pratiṣṭhitā
Word by word
The verse says
Whoever is unattached everywhere, who neither welcomes the good when it comes nor recoils from the bad — his understanding is firmly set.
In plain words
The evenness again, stated as behaviour.
Good arrives: he does not celebrate. Bad arrives: he does not recoil. And sarvatra — everywhere, in every case, not only the big ones.
This is the verse most likely to sound cold, and it repays a second look.
Where you've felt this · in health
A good vet handles the animal that is going to recover and the one that is not with the same hands. The difference is entirely real to them. It is just not allowed to reach their hands.
Going deeper
Nābhinandati na dveṣṭi — does not rejoice, does not hate. Taken flat, this sounds like a description of a dead person, and it is worth saying why it is not.
The verbs are strong. Abhinandati is not enjoys; it is to greet with acclaim, to hail. Dveṣṭi is not dislikes; it is hatred, active aversion. What is ruled out is the pouncing — the self rushing out to claim a good event or to shove away a bad one.
The Gita is not describing flat affect. Chapter 12 has this same person as maitraḥ karuṇa eva ca — friendly and compassionate — and Chapter 6 has them seeing themselves in all beings, which is not the profile of someone who feels little.
What has gone is the identification. The good thing is good; it is simply not being taken as an improvement in what you fundamentally are.
Anabhisneha in the first line is gentler than it looks too. Sneha literally means oil or grease — the stickiness that makes things adhere. The word for attachment in Sanskrit is, at root, about things not coming apart cleanly.