Cicero is hardly to be reckoned … for he delighted so much more in the practice, than in the theory, of his art, that he is perpetualy drawn off from the rigid philosophical analysis of its principles, into discursive declamations, always eloquent indeed, and often highly interesting, but adverse to regularity of system, and frequently as unsatisfactory to the practical student as to the Philosopher.

Introduction, p. 19 - Elements of Rhetoric (1828)