Less spiritual and yet intensely interesting and practical is the great department of the Old Testament known as the wisdom literature. _He that walketh with the wise shall be wise_ (Prov. xiii. 20) is as true to-day as when first uttered. This literature is a great mine of truth, almost entirely neglected by the Christian world. Systematic classification is the first requisite for the profitable study of the Proverbs and the later Wisdom of Ben Sira. From these the student may pass on to the fuller treatment of the omnipresent human problem, so sublimely presented in the book of Job, and to the many fundamental questions raised by Eccleslastes and the Wisdom of Solomon. [Sidenote: _Study of the Old Testament laws and institutions_] Last of all a year might well be spent in the study of the unfolding and concrete application and illustration of Israel's ethical and religious principles in the legal codes and institutions of the Old Testament. Many of these have found a higher expression, some are but symbolic, but others still have permanent authority and value. Studied as a whole and on the basis of a logical classification, this little understood field would also cease to be a jungle, and Instead would yield its own practical spiritual fruits. XVI RELIGIOUS EDUCATION--THE FUNDAMENTAL PROBLEM OF TO-DAY [Sidenote: _The practical realization of these possibilities_] This very brief and fragmentary outline of methods and possibilities of Old Testament study is not an impossible dream. In colleges and in a few Bible schools it is already being tried with the gratifying results that might be anticipated. To put it at once into force in most of our Sunday-schools would be absolutely impracticable. It is presented simply as a suggestion of a definite and practical goal toward which to work. With careful adjustment, these courses, adapted to different ages, could be arranged so that at least the intermediate grades in the Sunday-school would be studying in the same field at the same time. This plan provides for no graduation from the school of the Bible. It assumes that the Christian world is at last awakening to the real significance of religious education and to a recognition of the fact that the ultimate solution of our gravest national and social problems is to be found only in the inculcation of the true ethical ideals in the mind of the individual. It also assumes the fundamental principle that no worthy ends can be attained without real work, enthusiastic devotion, systematic methods, and above all a definite and worthy goal. It rests on the belief that the sense of gradual conquest and the attainment of practical results will alone inspire permanent devotion and evoke faithful work, and in the end prepare the individual scholar for the intelligent and loyal service of God. [Sidenote: _The overwhelming responsibility of the Sunday-schools_]