The smile is civilization’s finest adornment. It signifies the willpower and duty to fashion mankind’s coexistence as quietly and agreeably as possible so that it will always appear friendly. For it is all a matter of appearance. The smile is culture’s diploma: it is the diplomat’s badge. - Iwan Goll
The art of conversation consist as much in listening politely, as in talking agreeably.
Always try to do something for the other fellow and you will be agreeably surprised how things come your way - how many pleasing things are done for you. - Claude M. Bristol