This poem is from a book entitled Adagiorum Maxime Vulgarium Thesaurus, first published in 1730.
Rex Populi Lux Animusque
Quod sol in mundo, cor quodque in corpore, rex est
In regno populi lux animusque sui.
The vocabulary is keyed to the DCC Latin Vocabulary list. All the words in this poem are on that list:
animus -ī m.: spirit, mind
cor cordis n.: heart; cordī est, it is pleasing to (+ dat.)
corpus corporis n.: body
in: in, on (+ abl.); into, onto (+ acc)
lūx lūcis f.: light of day
mundus -ī m.: world, universe, heavens
populus -ī m.: people
que (enclitic) - and
qui quae quod: who, which, what / quis quid: who? what? which?
rēgnum -ī n.: kingship, kingdom
rēx rēgis m.: king
sōl sōlis m.: sun
sum, esse, fuī: be, exist
suus -a -um: his own, her own, its own