This poem is from the proverbial distichs of Georgius Carolides (1569-1612), which you can read online at the University of Mannheim.
Difficilis Gloriae Custodia
Gloria difficili et longo sudore paratur,
Maximus inventam sed retinere labor.
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:
custōdia (custōdiae, f.): protection, defense, custody
sūdor (sūdōris, m.): sweat
difficilis -e: not easy, hard, difficult
et: and
glōria -ae f.: glory, fame
inveniō -venīre -vēnī -ventum: find; discover
labor -ōris m.: toil, exertion
longus -a -um: long, far; longē: far, far off
māximus -a -um: greatest; māximē: most, especially, very much
parō -āre: prepare, acquire; parātus -a -um, ready
retineō -tinēre -tinuī -tentum: hold back, keep
sed: but