Text 57

 yah sarvatranabhisnehas
tat tat prapya subhasubham
nabhinandati na dvesti
tasya prajna pratisthita

Translation

In the material world, one who is unaffected by whatever good or evil he may obtain, neither praising it nor despising it, is firmly fixed in perfect knowledge.

Commentary by Srila Prabhupada 

There is always some upheaval in the material world which may be good or evil. One who is not agitated by such material upheavals, who is unaffected by good and evil, is to be understood to be fixed in Krishna consciousness. As long as one is in the material world there is always the possibility of good and evil because this world is full of duality. But one who is fixed in Krishna consciousness is not affected by good and evil, because he is simply concerned with Krishna, who is all-good absolute. Such consciousness in Krishna situates one in a perfect transcendental position called, technically, samadhi.

Commentary by Sri Visvanatha Cakravarti Thakur

That person is without affections which are subject to conditions (anabhisneha). Unconditional affection out of mercifulness however should remain to some degree. He is fixed in those qualities On receiving something favorable to himself (subham), through respect or feeding for instance, he does not approve, and receiving disrespect (asubham), such as a punch of the fist, he does not disapprove. He does not say, "Oh, you are so religious, serving a great devotee. I bless you with happiness." Nor does he curse the disrespectful person saying, "Go to hell, you sinful creature." He is prajna pratisthita, situated in samadhi (samadhim prati sthita), or well situated in prajna or samadhi.