What is the main theme of Wordsworth's poem "The World is too Much with Us"?

In Wordsworth's sonnet "The World is Too Much With Us," the narrator contrasts a way of living that is close to nature with a way of living that centers on materialism. He calls the materialist way of the world "getting and spending." In that worldly mode, we focus on earning money and buying things. In doing so, the narrator argues, we waste our power, by which he means we waste our most valuable potential as human beings.
The narrator calls the "boon," or wealth-focused working all the time, "sordid."
His point or theme is that we would become better humans if we lived closer to nature, closer to the sea and moon and wind. He mourns the passing of the Greek myths, which represented a time when people had a greater appreciation of the natural world and the divine spark that exists in it.