Never seem more learned than the people you are with. Wear your learning like a pocket watch and keep it hidden. Do not pull it out to count the hours, but give the time when you are asked. – Lord Chesterfield
Style is the dress of thoughts; and let them be ever so just, if your style is homely, coarse, and vulgar, they will appear to as much disadvantage, and be as ill received, as your person, though ever so well-proportioned, would if dressed in rags, dirt, and tatters. – Lord Chesterfield