Learn from me, O son of Kunti, in brief, how one who has reached perfection attains Brahman, which is the highest culmination of knowledge.
Explanation
Krishna now begins to summarize for Arjuna how a person who has attained perfection (siddhi) in selfless action reaches Brahman, the ultimate reality. This is the 'highest culmination of knowledge' (jñānasya niṣṭhā parā), the final steadiness in knowing the Self. The verse introduces the description that follows in the next verses; traditions differ on whether this culmination is pure knowledge itself or knowledge joined with devotion, and the verse leaves that open.