Persons who are learned in the Vedas, who utter the omkara, and who are great sages in the renounced order, enter into Brahman. Desiring such perfection, one practices brahmacharya. I shall now briefly explain to you this process by which one may attain salvation.

The great sages, the knowers of the Vedas, those who have renounced all desire — they all seek this same supreme destination. The practice of brahmacharya (disciplined, celibate focus of energy) is the path to it. Krishna offers to explain this path concisely — a sign of the chapter's deepening.