Pride and vanity are names which are commonly applied only to forms of self-approval that strike us as disagreeable or egotistical; but they may be used in a somewhat larger sense to indicate simply a more or less stable attitude of the social self toward the world in which it is reflected; the distinction being of the same sort as that between unstable and rigid egotism already suggested. These differences in stability, which are of great importance in the study of social personality, are perhaps connected with the contrast between the more receptive and the more constructive types of mind. Although in the best minds reception and construction are harmoniously united, and although it may be shown that they are in a measure mutually dependent, so that neither can be perfect without the other, yet as a rule they are not symmetrically developed, and this lack of symmetry corresponds to divergences of personal character. Minds of one sort are, so to speak, endogenous or ingrowing in their natural bent, while those of another are exogenous or outgrowing; that is to say, those of the former kind have a relatively strong turn for working up old material, as compared with that for taking in new; cogitation is more pleasant to them than observation; they prefer the sweeping and garnishing of their house to the confusion of entertaining visitors; while of the other sort the opposite of this may be said. Now, the tendency of the endogenous or inward activities is to secure unity and stability of thought and character at the possible expense of openness and adaptability; because the energy goes chiefly into systematization, and in attaining this the mind is pretty sure to limit its new impressions to those that do not disturb too much that unity and system it loves so well. These traits are, of course, manifested in the person’s relation to others. The friends he has “and their acceptance tried” he grapples to his soul with hooks of steel, but is likely to be unsympathetic and hard toward influences of a novel character. On the other hand, the exogenous or outgrowing mind, more active near the periphery than toward the centre, is open to all sorts of impressions, eagerly taking in new material, which is likely never to get much arrangement; caring less for the order of the house than that it should be full of guests, quickly responsive to personal influences, but lacking that depth and tenacity of sympathy that the other sort of mind shows with people congenial with itself.