How a gentleman shouldn't go to the devil

Flambeau had known Quinton in wild student days in Paris, and they had renewed the acquaintance for a week-end; but apart from Flambeau’s more responsible developments of late, he did not get on well with the poet now; choking oneself with opium and writing little erotic verses on vellum was not his notion of how a gentleman should go to the devil.

G.K. Chesterton, The Wrong Shape

Chesterton is just so darned funny. And this is just a toss off line in a Father Brown mystery.