Here, O joy of the Kurus, the resolute intellect is one-pointed. But the thoughts of those who lack resolve are many-branched and endless.
Explanation
Krishna is speaking to Arjuna about karma yoga (the discipline of action), which he has just said protects even in small measure. He contrasts a resolute intellect (buddhi), which holds one clear aim, with the scattered minds (buddhi) of the irresolute, which pull in countless directions. Commentators differ on what the single aim is: many take it as steady commitment to liberation or the Self, others as firm resolve in performing one's duty without attachment.