Smith on Commerce, both psychological and economic

Sometimes the best way to be sympathetic is to stop right at the border or boundary of a person or place, whose incomprehensibility just asks to to be acknowledged and not understood. I don't think that this is an argument against sympathy, open borders (both psychological and political), or worldwide exchange and commerce, but an argument for open and permeable borders that sometimes need to express reciprocity and equality (self<->other relations) and sometimes need to express distinction (self<-other; self->other). And so freedom is sometimes maintained by the reciprocal attunement of two selves, but also sometimes by the discord between them, or sometimes it is only attained when these two things are allowed to occur simultaneously.