The poems "Grass" by Carl Sandburg and "Anecdote of the Jar" by Wallace Steven share the same theme: the power of nature.
In Sandburg's "Grass," nature, representated by the grass, is a powerful character that can erase even the signs of horrifying events, such as battles and wars.
In "Anecdote of the Jar," Steven shows how nature invades and takes over the man-made jar and transforms it into a part of itself.