This little poem is from Giuseppe Gatti's Sales Poetici, Proverbiales, et Iocosi, published in 1703.
Quomodo Mundus Erit?
Mundus non mundat; mundus vero inquinat: ergo
Qui manet in mundo, quomodo mundus erit?
The vocabulary is keyed to the DCC Latin Vocabulary list. There are two words in this poem that are not on the DCC list:
inquinō, inquināre: stain, pollute, corrupt
mundō, mundāre: make clean, cleanse
ergo: therefore
in: in, on (+ abl.); into, onto (+ acc)
maneō manēre mānsī mānsum: remain
mundus -a -um: clean, neat, elegant
mundus -ī m.: world, universe, heavens
nōn: not
qui quae quod: who, which, what / quis quid: who? what? which?
quōmodo: in what way, how?
sum, esse, fuī: be, exist
vērus -a -um: true; vērē, truly