Here again we have to be on guard against understanding the aim too narrowly. An over-definite interpretation would at certain periods have excluded scientific discoveries, in spite of the fact that in the last analysis security of social progress depends upon them. For scientific men would have been thought to be mere theoretical dreamers, totally lacking in social efficiency. It must be borne in mind that ultimately social efficiency means neither more nor less than capacity to share in a give and take of experience. It covers all that makes one's own experience more worth while to others, and all that enables one to participate more richly in the worthwhile experiences of others. Ability to produce and to enjoy art, capacity for recreation, the significant utilization of leisure, are more important elements in it than elements conventionally associated oftentimes with citizenship. In the broadest sense, social efficiency is nothing less than that socialization of mind which is actively concerned in making experiences more communicable; in breaking down the barriers of social stratification which make individuals impervious to the interests of others. When social efficiency is confined to the service rendered by overt acts, its chief constituent (because its only guarantee) is omitted,--intelligent sympathy or good will. For sympathy as a desirable quality is something more than mere feeling; it is a cultivated imagination for what men have in common and a rebellion at whatever unnecessarily divides them. What is sometimes called a benevolent interest in others may be but an unwitting mask for an attempt to dictate to them what their good shall be, instead of an endeavor to free them so that they may seek and find the good of their own choice. Social efficiency, even social service, are hard and metallic things when severed from an active acknowledgment of the diversity of goods which life may afford to different persons, and from faith in the social utility of encouraging every individual to make his own choice intelligent.