If La Espero is the movement's hymn, La vojo is its work song: not "the world will change" but "keep going while it does not". Zamenhof printed it in the Fundamenta Krestomatio of 1903, beside Al la fratoj and Mia penso.
Its most quotable image is in the refrain: , , traboras granitan, even a small drop, striking constantly, bores through the granite mountain. And the third stanza is the movement's whole method in four lines: we sow, a hundred seeds are lost, a thousand are lost, we sow.
The grammar to watch is the -ita participle, the finished passive, which this poem uses like a drumbeat: (defined), (chosen), celitan (aimed at), repurigitaj (made clean again), , hardita (tested, hardened) and signita (marked out). Each one is a verb that has already been done to something. Participles and the passive have the system.
Celitan is worth a second look: , to aim, plus -it-, plus the -n of the object, because celitan is what we walk. The adjective agrees, ending and all.