Book 12
25g
It is in fact as impossible to write well on the operations in a war, if a man has had no experience of actual service, as it is to write well on politics without having been engaged in political transactions and vicissitudes. And when history is written by the book-learned, without technical knowledge, and without clearness of detail, the work loses all its value. For if you take from history its element of practical instruction, what is left of it has nothing to attract and nothing to teach. Again, in the topography of cities and localities, when such men attempt to go into details, being entirely without personal knowledge, they must in a similar manner necessarily pass over many points of importance; while they waste words on many that are not worth the trouble. And this is what his failure to make personal inspection brings upon Timaeus. . . .
