“It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light,...”
What It's Doing
Dickens opens with the longest, most exhausting sentence he could write, and it works because the exhaustion is the point. He strings ten contradictions together using identical grammatical scaffolding, each one canceling the last, until the sentence collapses under its own weight. The repetition of 'it was' is rhythmic, almost liturgical, like a sermon or a legal document. The whole novel is going to operate this way: London against Paris, loyalty against betrayal, life against death, and the reader is placed inside that opposition before they even know what the story is.
What You Can Steal
If your book lives inside a contradiction, name both sides in the first sentence and let the tension between them do the work of a hook.