Rhetoric Day 58.1
[T]hat the hearers constantly show themselves attentive, receptive, and well-disposed to us – is to be secured throughout the discourse, it must in the main be won by the Introduction to the cause. . . . In the Introduction of a cause we must make sure that our style is temperate and that the words are in current use, so that the discourse seems unprepared.
- Cicero "Ad Herennium"