That Supreme Person, O Partha, is to be reached only through single-minded devotion. Within him all beings abide, and by him all this universe is pervaded.
Explanation
Krishna is speaking to Arjuna about the highest goal mentioned in the previous verse, the unmanifest, imperishable supreme abode. He says this Supreme Person (puruṣa) is reached through undivided devotion (bhakti), meaning devotion with no other object. He also says that all beings exist within him and that he pervades everything. Traditions differ on whether this stresses a personal God or an all-pervading ultimate reality, and both readings draw on this verse.