Quintilian

While we are examining into everything we sometimes find truth where we least expected it.

Forbidden pleasures alone are loved immoderately; when lawful, they do not excite desire.

It is fitting that a liar should be a man of good memory.

Prune what is turgid, elevate what is commonplace, arrange what is disorderly, introduce rhythm where the language is harsh, modify where it is too absolute.

There is no one who would not rather appear to know than to be taught.