The Yoga of Liberation by Renunciation

This verse introduces the teaching about transcending the gunas and attaining Brahman: understand from Me, in summary (siddhiṁ prāpto yathā brahma tathāpnoti nibodha me samāsenaiva kaunteya), how one having attained perfection attains Brahman, which is the supreme establishment in knowledge (niṣṭhā jñānasya yā parā). This is the culmination: after performing one's duty with devotion and renunciation, one attains perfection and ultimately Brahman. This is the path: perfection through duty leads to Brahman, the supreme establishment in knowledge. When you understand this, you realize: you don't just perform duty for duty's sake. You perform duty with devotion and renunciation, which leads to perfection, and through perfection, you attain Brahman—the ultimate reality, the supreme goal. This is the path: your duty → perfection → Brahman.