Ocean, who is the source of all.

The line invokes the archaic Greek idea—found in early epic and later mythography—that the primeval waters (personified as Oceanus) stand at the beginning of generation. Calling “Ocean” the “source of all” frames the sea not merely as a physical expanse but as a cosmological origin, a generative principle from which gods and the world arise. In Homeric poetry, such language also reflects the epic habit of grounding the human sphere in a vast, encircling natural order: the ocean marks the boundary of the known world and, symbolically, the wellspring from which life and lineage flow.