Institutio Oratoria

Quintilian

Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.

Consequently when it is possible to say

I have a young son,
it is quite superfluous to say,
Being desirous of children I took a wife, a son was born whom I acknowledged and reared and brought up to manhood.
For this reason some of the Greeks draw a distinction between a concise statement (the word they use is σύντομος ) and a brief statement, the former being free from all superfluous matter, while the latter may conceivably omit something that requires to be stated.

Personally, when I use the word brevity, I mean not saying less, but not saying more than occasion demands. As for repetitions and tautologies and diffuseness, which some writers of textbooks tell us we must avoid, I pass them by;

v4-6 p.75
they are faults which we should shun for other reasons beside our desire for brevity.

But we must be equally on our guard against the obscurity which results from excessive abridgment, and it is better to say a little more than is necessary than a little less. For though a diffuse irrelevance is tedious, the omission of what is necessary is positively dangerous.