“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."”
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