Classic style presents writing as showing the reader something true, not performing authority
Pinker borrows and adapts the concept of "classic style" to describe prose that imagines a writer and reader standing side by side, looking at some feature of the world together, with the writer simply pointing things out in plain, confident language. This contrasts with what he calls self-conscious or bureaucratic styles, where the writer seems more focused on covering themselves, hedging, or performing expertise than on actually showing the reader something.
He argues classic style requires a kind of confidence: the writer has to trust that the ideas are interesting enough to stand on their own without inflated vocabulary or defensive qualifications. This doesn't mean oversimplifying complex ideas — it means presenting even difficult ideas as if they're inherently graspable, rather than wrapping them in jargon that signals sophistication instead of communicating.
Takeaway: good style isn't decoration on top of ideas, it's the confidence to let ideas be seen clearly.