This is from the enormous anthology of distich poetry assembled by Barthold Nihus, Epigrammata Disticha, published in 1642; the poem is by Ottomar Luscinius (1487-1537).
Mortales fugiunt nos cuncta, cadentia fato;
Vel, quod crediderim, nos magis haec fugimus.
The vocabulary is keyed to the DCC Latin Vocabulary list. All the words in this poem are on that list:
cadō cadere cecidī cāsum: fall, be killed
crēdō crēdere crēdidī crēditum: believe
cūnctus -a -um: entire all together
fātum -ī n.: fate
fugiō fugere fūgī fugitum: flee, escape
hic haec hoc: this; hōc: on this account
magis: more
mortālis -e: liable to death, mortal
nōs nostrum/nostrī nobis nōs: we
qui quae quod: who, which, what / quis quid: who? what? which?
vel: or else, or; even; vel . . . vel: either… or