It is boorish to live ungraciously: the giving is the hardest part; what does it cost to add a smile?
Jean de la BruyereA man may have intelligence enough to excel in a particular thing and lecture on it, and yet not have sense enough to know he ought to be silent on some other subject of which he has but a slight knowledge; if such an illustrious man ventures beyond the bounds of his capacity, he loses his way and talks like a fool.
Jean de la Bruyere