A commercial society whose members are essentially ascetic and indifferent in social ritual has to be provided with blueprints and specifications for evoking the right tone for every occasion.
I shall suggest on the contrary that all communication relies to a noticeable extent on evoking knowledge that we cannot tell and that all our knowledge of mental processes like feelings or conscious intellectual activities is based on a knowledge which we cannot tell.
Piano playing is a dying art. I love the fact that I can be one guy with one instrument evoking an emotional and musical experience.
No matter how full a reservoir of maxims one may possess and no matter how good one's sentiments may be if one has not taken advantage of every concrete opportunity to act one's character may remain entirely unaffected for the better.