The speaker in Walt Whitman's "Song of Myself" ultimately concludes that grass symbolizes the continuity of life, even in the face of death. The lines reflect a deep connection between life, death, and rebirth. The speaker observes that grass grows over the graves of those who have passed, suggesting that while bodies may be buried, life continues. The assertion that "the smallest sprout shows there is really no death" reinforces the idea that death is part of life's ongoing cycle, leading to new growth and existence rather than an end.
Therefore, the most accurate interpretation is: Grass grows over buried people, allowing them to gain new life after death. This understanding highlights the speaker's perspective that death is not a finality but rather a transition, with grass symbolizing life's resilience and continuity.