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That highest Purusha, O Arjuna, is attainable by unswerving devotion to Him alone within Whom all beings dwell and by Whom all this is pervaded.

That supreme Person, son of Pritha, within whom all beings dwell and by whom all this is pervaded, is to be reached by devotion directed to nothing else.

Krishna says that this supreme Person (puruṣa), in whom all beings dwell and by whom all this is pervaded, is reached by devotion (bhakti) directed to nothing else. The verse brings together immanence and transcendence: the highest is both the container of all beings and the one who pervades them. And it names the means of reaching this goal: undivided devotion. After describing yogic techniques and cosmic cycles, Krishna returns to the simplest and most direct path.