Stevens's "Thirteen Ways of Looking at a Blackbird" presents, as I said, some perceptions of the world, some perspectives taken toward the world, related to blackbirds. It leads us, or should, to contemplate the innumerable perspectives that are taken on the world we share with blackbirds and innumerable other sentient beings with whom we share this same world.
The way to read this poem is to accumulate the perspectives expressed, all perspectives taken in/with-in a single world, suggesting all the other perspectives taken in and on parts or aspects of this world which would finally -- if they could be taken from within a single mind -- constitute the entirety of this world (just a particular planetary world in our case -- the earthworld) as it is real-ized from the totality of viewpoints available within it.
Blending, integrating, various perspectives on anything brings us closer to an appreciation of the integration of the world as experienced and 'knowable' by the beings living in this world who in sum, in toto, can be said to 'constitute' this world in the fullness of its experienced plenitude. Would any of say that we could do better than this understanding of 'what-is' from within our own personal perspective or that of a school of philosophy or neuroscience to which we adhere? The world as experienced, the world understood as 'lived reality', is an incomprehensibly immense symphony of experience, some shared, some unshared, but in general integrated in the experiencing of what-is, which no single mind or theory can encompass.
What are the harmonics that seem to be essential in the physics of this world, perhaps supporting the similarities discovered in the ways we and others of our own species share commonalities of experience here, which, if Panksepp is correct, include deep commonalities with the experience of other living creatures? What are the harmonics we share and yet experience in individual ways as well in any and every lifetime? Can we humans at some point understand the extent of what we share sufficiently to harmonize the conditions of life on this planet for everyone, all humans and life in general?