Good advice for writing

"We should remember rhetoric’s doctrine of inventio, which teaches us how to find the best content and the most convincing arguments. And which teaches us to prefer exploring one central argument in depth rather than superficially reeling off a number of different arguments."

"In the same way, rhetorical doctrine tells us about the appropriate development of our theme, dispositio, that the different sections of our disposition have different functions: the introduction should arouse interest and win good-will and credibility. The presentation of the matter should be brief, clear and concise. Our argumentation should provide proof of our theses and refute our opponents’ objections. And our conclusion should summarize and where relevant appeal to feelings and action."

From "The Rhetoric of Powerpoint" by Jens Kjeldsen, seminar.net