He who neither rejoices, nor dislikes, nor grieves, nor desires, who renounces good and evil, and who is devoted, is dear to me.
Alike to friend and foe, in honour and dishonour, in heat and cold, happiness and misery, free from attachment, alike in praise and censure, reticent, satisfied with anything, steady in mind - such a devoted person is dear to me.
Chapter 12, Bhagavad Gita