6:32
आत्मौपम्येन सर्वत्र समं पश्यति योऽर्जुन ।
सुखं वा यदि वा दुःखं स योगी परमो मतः ॥६- ३२॥
aatmaupamyena sarwatra samaM pashyati yo'rjuna ।
sukhaM waa yadi waa duHkhaM sa yogii paramo mataH ॥६- ३२॥
Source: Automatic ITRANS Transliteration
Who regards all the same, in comparison to the self, Arjuna
Be it their contentment or their sorrow, that yogi is considered supreme.
Source: Milind S. Pandit
One is considered the best yogi who regards every being like oneself, and who can feel the pain and pleasures of others as one's own, O Arjuna.
He is a perfect yogi who, by comparison to his own self, sees the true equality of all beings, both in their happiness and distress, O Arjuna!
Source: Bhagavad Gita As It Is