The servant bringing Yahweh's message to the Gentiles and helping them to understand it is spoken of as if Yahweh made the servant a light that shines among the Gentiles. See how you translated a similar phrase in [Isaiah 42:6](../42/06.md). (See: [[rc://en/ta/man/jit/figs-metaphor]])
The places on the earth that are very far away are spoken of as if they were the places where the earth ends. This phrase also forms a merism and refers to everywhere in between the ends. Alternate translation: "to all the farthest places of the earth" or "to the entire earth" (See: [[rc://en/ta/man/jit/figs-metaphor]] and [[rc://en/ta/man/jit/figs-merism]])