In Mary Oliver's poem "Crossing the Swamp," the poet utilizes effective literary elements, namely imagery, metaphor, and symbolism, in order to portray the physical aspect of crossing the swamp, while also highlighting the lessons learned from it, ultimately revealing the unevitable reality of facing hardship in life and learning how to navigate through it.

Oliver starts the poem by utilizing imagery and metaphor with the purpose of painting the physical appearance of the swamp and how the overall scenery looks like for the narrator. The swamp is perceived as the "endless wet thick cosmos" (1-2) where appears the "nugget of dense sap, branching vines, the dark burred faintly belching bogs" (4-8). The metaphor "endless wet thick cosmos" initially paints the swamp as long, large, and hard to navigate through because of how "thick" it is, whereas the details such as "dense sap" and "branching vines" contribute to the busy and difficult setting the narrator is put into. The first impression of the swamp foreshadows the challenges and obstacles the narrator is going to face as they continue their journey through it. Following the imagery, Oliver applies symbolism on the word "swamp" (9), where it is italicized. By signifying the readers that it is not a swamp, but a swamp, Oliver is sending a clear message: the swamp is more than just a swamp. It is the "struggle" (10) that everyone has to face and go through, not just in this specific, perhaps unusual occasion of crossing the swamp, but also about anything in life. And challenges in life are not easy, just like how the swamp appears "seamless" (12), it can actually "knock" one's "bones" (13-14), and "sink" one "silently into the black" (20-21). The vivid details and metaphors strengthen how the narrator views the swamp in general: hard to cross through, risky to their own physical parts, and could create setbacks for them. And yet, the "struggle" still has to go on, they have to "try for foothold, fingerhold, mindhold" (15-17), do whatever it takes for them to stand and advance forward, because "crossing the swamp" is a journey, and a journey has a destination, which Oliver explores in the next portion of the poem.

Despite how the narrator perceives the swamp as full of challenges, there is still something that the swamp offers to the narrator. To portray that, Oliver employs details and juxtaposition. Oliver talks about the "fat grassy mires," the "succulent marrows of earth" (25-28), and how they inspire the narrator to move forward and "feel not wet" (22-23). By introducing this detail, Oliver is implying that all the challenges and obstacles they are facing is not significant compared to how the swamp, and the parts that are in it, have been there for "all these years" (32); the narrator is not as experienced as the swamp itself, and that means they can learn something out of it. Even though throughout the poem, the swamp is portrayed as an ugly, unpleasant place to be crossing through, its value suddenly changes at the end, showing how the swamp "make[s] of its life a breathing palace of leaves" (35-36). The contrast between the unpleasant "swamp" and the "palace" that provides "life" signifies a change in how the narrator perceives the value of the swamp. Crossing through the swamp and seeing all of its details, all of the beautiful and ugly, has made the narrator realizes that everything can shine and be beneficial even when it appears ugly and dense, that everyone deserves "one more chance" (30) to prove themselves different. That is the destination of this journey, the lesson valuable lesson about life that was taught by the swamp as the narrator navigates through it.

In a greater sense, setbacks in life are inevitable. People have to take one step backward in order to take two steps forward. This lesson is obviously seen by how Oliver organizes the structure of this poem. For every quadtrain, the next line is indented more compared to the previous one. All 9 quadrains like that create a visually appealing structure of the poem, resembling the swamp itself as hard to navigate and there will be moment where one has to take steps forward and backward. The clever structure of the poem also lies on the sentences and how their sizes vary. Despite appearing as a long poem, there are actually only 4 sentences. The size changes from medium, to small, back to medium, and the final sentence is a lengthy one. The various sizes is not unintentional; Oliver varies the lengths that way to portray how in life, things are not even. There will be some quick moments of joy, and there might be a long period of sadness and hardship. But ultimately, everything works together to create a beautiful life, just like this beautiful piece of literature. This appearance of the poem, the resemblance of the swamp, is meant to let the readers know how the narrator perceives the swamp in the first place, and what the swamp has been trying to communicate to the narrator since the very beginning. The narrator can clearly see how un-straightforward and challenging this journey is going to be, and the swamp is sending to the narrator, and the readers, a reassurance: just go for it; it might be a "struggle", it might be "endless," but it is "the center of everything" (3-4).

Mary Oliver has cleverly used the journey of crossing the swamp and the lessons learned from the journey to highlight the reality of hardship in life and how to navigate through it, through the use of effective literary devices.