Acts themselves alone are history, and these are neither the exclusive property of Hume, Gibbon nor Voltaire, Echard, Rapin, Plutarch, nor Herodotus. Tell me the Acts, O historian, and leave me to reason upon them as I please; away with your reasoning and your rubbish. All that is not action is not worth reading.
Rhetoric completes the tools of learning. Dialectic zeros in on the logic of things, of particular systems of thought or subjects. Rhetoric takes the next grand step and brings all these subjects together into one whole.
It is not because angels are holier than men or devils that makes them angels, but because they do not expect holiness from one another, but from God only.