One of the oldest traditions in oratory is the art of rhetoric. Rhetorical devices were used and taught by ancient Greek philosophers who knew how to convince audiences of their new ideas.
The human mind likes to hear things in groups of three. Groups of three give balance and rhythm to a speech and are easier for the audience to remember.
Alliteration – using words that begin with the same letter – can be used for pleasant effect and the play of words.
The rhetorical question to which the speaker gives an answer is a good presentation technique. It can break up the speech into meaningful sections with question and logical answer.