Education should be continuous through life. The University Extension movement is endeavoring to meet this demand. It has already to its credit a considerable extension of knowledge, as well as the stirring up of interest in things of the mind among those whom it reaches. But far greater tasks than it has yet attacked remain. The academic method is not suited to the instruction of adults. A method will have to be worked out for teaching a subject to mature minds different from that which is appropriate in introducing the subject to the relatively immature minds of students. The student who has not yet entered vocational life needs to be put in possession of the principles by which he can lay hold of life. A mature person who is deficient in theoretical education needs to be helped to interpret his vocational experience in such a manner as to find his way back to the principles. In the one case there is the outlook and the emptiness; in the other case the fullness of content without the comprehensive outlook. Secondly, the stages of vocational development through which the worker has already passed in his vocation are to be borne in mind, and the teaching adapted to the different stages. I have suggested four divisions: that of apprenticeship, that of initial mastery, that of more complete mastery, and the emeritus stage.[84] Thirdly, it is getting to be increasingly difficult for a specialist in any one branch to keep abreast of the progress made in other branches. Popularization of the ordinary kind does not satisfy. It means, as a rule, diluting the subject-matter, not truly simplifying it. Provision should be made, in any large and generous scheme of public education, for enabling ripe minds to assimilate the ripest fruits produced by contemporary thinkers and writers who work in other fields. NOTE A few outstanding points in regard to what is called Moral Education may be added to this chapter. There should be ethical teaching in the universities. The kinds of ethics taught should be adapted to the university period of life, emphasis being put on the experiences of the student at that time of life,—on friendship, the sex relation, the vocational outlook, etc. be included in the programme for the education of adults.