History of the Peloponnesian War

For we have more experience in land service by use of the sea than they have in sea service by use of the land.

Nor shall they attain the knowledge of naval affairs easily.

For yourselves, though falling to it immediately upon the Persian war, yet have not attained it fully. How then should husbandmen not seamen, whom also we will not suffer to apply themselves to it by lying continually upon them with so great fleets, perform any matter of value?

Indeed, if they should be opposed but with a few ships, they might adventure, encouraging their want of knowledge with store of men; but awed by many they will not stir that way, and not applying themselves to it will be yet more unskillful and thereby more cowardly.

For knowledge of naval matters is an art as well as any other and not to be attended at idle times and on the by, but requiring rather that while it is a-learning, nothing else should be done on the by.