The key theme of this poem is the pride and arrogance of the hawk, which believes itself to be the center of the universe, the product of "the whole of Creation" and now the director of it. In the hawk's mind, every part of the natural kingdom is the way it is in order to provide "advantage to" the hawk; the whole of creation belongs to it ("mine"), and the hawk can decide what lives and what dies ("I kill where I please"). The final stanza of the poem, in particular, underlines the hawk's believe that the world moves at its whim and according to its direction: the hawk asserts that nothing has ever changed in its world under its leadership and that it will keep everything "like this," the way it is.
We can interpret the hawk in this poem as a metaphor for humanity, too. While the poem could be read as simply a commentary on the place of the hawk, the great predator, in nature, the implied criticism of the hawk's arrogant and high-handed treatment of nature (and its belief that it is a godlike figure, with everything, including the sun, "behind" it) could equally be applied to humans. Like the hawk, humanity believes itself to be at the center of creation, with every part of nature serving its purposes. Ultimately, however, this is hubristic—we cannot hope to keep things "like this" and expect to go unchallenged, because nature is not actually ours to command.