„Caesar overtook his advanced guard at the river Rubicon, which formed the frontier between Gaul and Italy. Well aware how critical a decision confronted him, he turned to his staff, remarking: "We may still draw back but, once across that little bridge, we shall have to fight it out."“
— Sueton, livro The Twelve Caesars
Original: (la) Consecutusque cohortis ad Rubiconem flumen, qui provinciae eius finis erat, paulum constitit, ac reputans quantum moliretur, conversus ad proximos: "Etiam nunc," inquit, "regredi possumus; quod si ponticulum transierimus, omnia armis agenda erunt."
Fonte: The Twelve Caesars, Julius Caesar, Ch. 31