The poem is built on three quiet comparisons, each one about going unseen. A cloud on the horizon, a sturdy branch, a single grain of sand in the desert: all are real and present, yet nobody looks at them. The speaker says that this is how many people live their time, their dreams, and finally their end.
The structure helps the idea land. Each image comes first, then a pause marked by the ellipsis, then the human comparison. That small hesitation makes the reader wait for the point, and the point is a sad one. The images move from something light and distant (the cloud), to something solid but overlooked (the branch), to something almost vanishingly small (the sand). The scale shrinks as the poem goes on.
The speaker sounds gentle and observant rather than angry. There is sympathy here, and a sense of loneliness, but also a certain stillness. The mood is wistful: it asks us to notice the people and lives that usually slip past. The title's "fork far from all understanding" suggests a place where such lives branch off and go unexplained.