Discourses on Livy

Whether a general engagement should be preceded by skirmishes; and how, avoiding these, we may get knowledge of a new enemy.

Besides all the other difficulties which hinder men from bringing anything to its utmost perfection, it appears, as I have already observed, that in close vicinity to every good is found also an evil, so apt to grow up along with it that it is hardly possible to have the one without accepting the other. This we see in all human affairs, and the result is, that unless fortune aid us to overcome this natural and common disadvantage, we never arrive at any excellence. I am reminded of this by the combat between Titus Manlius and the Gaul, concerning which Livius writes that it "determined the issue of the entire war; since the Gauls, abandoning their camp, hastily withdrew to the country about Tivoli, whence they presently passed into Campania."