Which lines are the best example of antithesis

Plz i need someone to write me a narrative from scratch

What is wong with this sentence cameron, who has an extreme and unreasonable suspicion of other people and their motives, suffers from paranoia which is a psychological disorder characterized by delusions of persecution or grandeur, was absolutely sure that someone was following him even though he was absolutely alone and hadn't seen a car for miles and miles.

How does the author's purpose affect his or her text structure