Rhetoric translated by Joe Sachs
Book I
1 - It would be absurd to say that a man should be ashamed to be unable to defend himself with his body yet at the same time not say he should be ashamed of not being able to defend himself with speech and reason.
2 - Rhetoric is a capacity to see what is capable of being persuasive (theorein; contemplative thinking). It is not concerned with any particular subject. The means are those provided by the speaker, and not those available at the outset.
Aristotle makes an interesting point about epistemology here, that systematic knowledge about particular concretes is not possible because they are infinitely various (any concrete is completely individual and unique). Rhetoric, then, should involve types of men, not specific individual men.
3 -
Rhetoric is properly used for these reasons.
type: material, method, time
Advice: warning, blame, future
court: accusation, justice, past
display: praise, beauty, present
4 - Since rhetoric is a practical faculty about general subjects or reasoning, developing it further as a science would destroy its nature. That knowledge is required, but it is not itself part of rhetoric.
Advice is primarily political in this context. Someone giving advice should know about finances, war and peace, regarding territory, exports and imports, and lawmaking.
5 - The way Aristotle describes the constituents of happiness sounds like a Nietzschean sense of the constituents of nobility. In this context, this description explains why Nietzsche saw Greek culture as a culture of strength.