Ignorance is bold, and knowledge is reserved - Thucydides

As a rule those who were least remarkable for intelligence showed the greater powers of survival. Such people recognized their own deficiencies and the superior intelligence of their opponnents; fearing that they might lose a debate or find themselves out-manoeuvred in intrigue by their quick-witted enemies, they boldly launched straight into action; while their opponents, overconfident in the belief that they would see what was happening in advance, and not thinking it necessary to seize by force what they could secure by policy, were the more easily destroyed because they were off their guard. 84 Certainly it was in Corcyra that

What we should lament is not the loss of houses or of land, but the loss of men’s lives. Men come first; the rest is the fruit of their labour.

At times Thucydides may be clearly mistaken in both detail and interpretation, but the extent of his accuracy and analysis astounds in a world where travel was difficult, written sources rarely available, and the physical obstacles to the writing of history substantial.