Virgil, Aeneid 6.847-853
Famous lines: Anchises explains the future of Rome to Aeneas.
excudent alii spirantia mollius aera
(credo equidem), vivos ducent de marmore vultus,
orabunt causas melius, caelique meatus
describent radio et surgentia sidera dicent:
tu regere imperio populos, Romane, memento
(hae tibi erunt artes), pacique imponere morem,
parcere subiectis et debellare superbos.
Others (I believe it, to be sure) will hammer out bronze which breathes more gently; they will bring living faces out of marble; they will plead cases better and delineate with measuring-rods the movements of the sky and tell of the rising constellations. You, Roman – remember you’ll rule the nations with your power (these will be your skills); and lay law on peace, spare the conquered and subdue the proud.