If Verse 47 was the rule, Verse 48 is the definition. Krishna instructs Arjuna to perform his actions (kuru karmāṇi) while situated in Yoga (yoga-sthaḥ). How does one situate themselves in Yoga? By abandoning attachment (saṅgaṃ tyaktvā) and becoming perfectly equal (samo bhūtvā) to both success (siddhi) and failure (asiddhyoḥ). Krishna then provides the ultimate, concise definition of the word: 'samatvaṃ yoga ucyate' (Equanimity is called Yoga).