Often we do not think about how sustainability and solidarity are intertwined. The inclusion of all human beings in society allows them to live better and share the effort to preserve the environment and realize that they are benefited in this process.
This sonnet is very illustrative of this fact, because the woman's face is painted with a part of nature and becomes an element of the nature, or that becomes even more obvious. Poetry is a tool of nature's aspiration to be considered our "real material" our real essencial element. In this Sonnet even passion can be considered a part of nature.