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
The vet handles the dog that will recover and the one that will not with exactly the same hands. The difference is completely real to her. It is just not allowed to reach her hands.
Going deeper
Taken flat, nābhinandati na dveṣṭi - does not rejoice, does not hate - sounds like a description of a dead person. It is worth saying why it is not.
The verbs are strong ones. The first does not mean enjoys; it means to greet with acclaim, to hail. The second does not mean dislikes; it is hatred, active aversion. What is ruled out is the pouncing - the self rushing out to claim a good event or shove away a bad one.
This is not flat feeling. Chapter 12 describes this same person as friendly and compassionate, and Chapter 6 has them seeing themselves in every being. That is not the profile of someone who feels little.
What has gone is the identification. The good thing is still good. It is simply not being taken as an improvement in what you fundamentally are.
And anabhisneha in the first line is gentler than it looks. Sneha literally means oil or grease - the stickiness that makes things adhere. The Sanskrit word for attachment is, at its root, about things not coming apart cleanly.