The speaker announces a decisive break: she has moved west, traveling in the same direction as the sun. Her tone is direct and almost triumphant as she tells someone—perhaps an old life or a person trying to keep her—that she cannot be held back or slowed down. What she has begun has no finish line and no resting places; she will keep moving until she is surrendered to the sea.
That gives the poem a bright, restless energy. There is freedom here, but also a hint of inevitability and even loneliness beneath the confidence. The west and the sea feel like both real places and symbols for total release or disappearance. The mood is open, determined, and slightly solemn.