One of the greatest difficulties in civil war is, that more art is required to know what should be concealed from our friends, than what ought to be done against our enemies.
Lord ChesterfieldA seeming ignorance is very often a most necessary part of worldly knowledge. It is, for instance, commonly advisable to seem ignorant of what people offer to tell you; and when they say, Have not you heard of such a thing? to answer No, and to let them go on, though you know it already.
Lord Chesterfield