Ἀμαθία μὲν θράσος, λογισμὸς δὲ ὄκνον φέρει - Thucydides

As to the speeches which were made either before or during the war, it was hard for me, and for others who reported them to me, to recollect the exact words.I have therefore put into the mouth of each speaker the sentiments proper to the occasion, expressed as I thought he would be likely to express them, while at the same time I endeavoured, as nearly as I could, to give the general purport of what was actually said.

(Book 1 Chapter 22.1)

The Spartans meanwhile, man to man, and with their war songs in the ranks, exhorted each brave comrade to remember what he had learned before; well aware that the long training of action was of more use for saving lives than any brief verbal exhortation, though ever so well delivered.

a collision at sea will ruin your entire day