Here is today's Rhyming Distich, and here are some more posts with Rhyming Distichs. I found this poem in the collection Philosophia Patrum edited by Julius Wegeler.
Dicit Fortuna: rotula si niterer una
Et non mutarer, tunc non fortuna vocarer.
The vocabulary is keyed to the DCC Latin Vocabulary list. There is only one word in this poem that is not on the DCC list:
rota, f. - wheel
dīco dīcere dīxī dictum: say; causam dicere, plead a case; diem dicere, appoint a day
et: and
fortūna -ae f.: fortune
mūto -āre: change
nītor nītī nīsus/nīxus sum: strive
nōn: not
sī: if
tum/tunc: then
ūnus -a -um: one
voco -āre: call