Sanskrit
बुद्धेर्भेदं धृतेश्चैव गुणतस्त्रिविधं शृणु । प्रोच्यमानमशेषेण पृथक्त्वेन धनञ्जय ॥ २९ ॥
buddher bhedaṃ dhṛteścaiva guṇatas trividhaṃ śṛṇu procyamānam aśeṣeṇa pṛthaktvena dhanañjaya
Translation
The division of Reason and of firmness also, threefold according to the qualities, hear thou related, unreservedly and severally, O Dhananjaya.
Annie Besant · The Bhagavad-Gita, translated by Annie Besant (4th ed., 1922) — Wikisource · Public Domain
Explanation
Having covered knowledge, action, and actor, Krishna signals two more triads still to come — intellect (buddhi) and resolve (dhriti) — each also threefold by guna. The chapter’s architecture is now fully visible: six concepts (tyaga, knowledge, action, actor, intellect, resolve) run through the same three-part sieve, with happiness held in reserve as a seventh for verses 36 through 39.