American Express? . . . That'll do nicely, sir.

The line reads like a clipped exchange in a shop, hotel, or restaurant: a customer offers “American Express” (likely a traveler’s cheque or charge card), and the clerk’s deferential reply—“That’ll do nicely, sir”—signals acceptance and a certain old-fashioned politeness. As a standalone quotation, it functions less as a philosophical aphorism than as a cultural snapshot of mid‑20th‑century consumer travel and the prestige of branded payment instruments. It can be used ironically to evoke class, service etiquette, or the reassuring authority of a well-known financial intermediary when money changes hands away from home.