“He who does not know how to smile should not open a shop.”Georg Christoph Lichtenberg · Caietele de însemnări · 1799 · Caietul G, însemnarea 1
Whoever works with people sells warmth first, goods second.
Lichtenberg, with his characteristic irony, turns a piece of practical advice into a remark on human relations. The smile here is the outward sign of an inner disposition: whoever cannot meet people with warmth will not build the trust that every exchange requires. The mechanism is simple: a customer buys not only the goods but the experience of being treated well. A surly shopkeeper loses customers not for lack of products but for lack of humanity.
Why it matters The rule holds today well beyond shops: in any trade or relationship requiring contact with people, genuine warmth is not an ornament but a condition of success.