Siman 591

(148.) One asked him whether to be a teacher — he replied: "No." (For he o.b.m. said that three things are not considered important in his eyes: a shoychet [ritual slaughterer], a teacher, and a Chassid in a small town — because it is easy to stumble into pride, G-d forbid.) "Better for you to be a merchant and businessman — only when you walk in the marketplace, despise and belittle this world with your mouth."