“Since one person differs from another in disposition, when men are appointed to offices this should be tested, and their tendencies observed and their ability estimated, so that the office may be well filled. A saw cannot do the work of a gimlet, and a hammer cannot take the place of a knife, and men are just like this. There is a use for both sharp and blunt at the right time, and if this is not well apprehended the relation of lord and vassal will become disturbed.”