While international congresses of literature, science, art, and industry have been accomplished by previous expositions, yet to classify and select the topics in sympathy with the classification and installation of the exhibits material is a step considerably in advance of the custom. The men who build an exposition must by temperament, if not by characteristic, be educators. They must be in sympathy with the welfare of humanity and its higher destiny. The exhibitions at this Exposition are not the haphazard gatherings of convenient material, but the outline of a plan to illustrate the productiveness of mankind at this particular time, carefully digested, thoroughly thought out, and conscientiously executed. The exhibit, therefore, in each of the departments of the classification, as well as in the groups of the different departments, are of such character, and so arranged as to reflect the best that the world can do along departmental lines, and the best that different peoples can do along group lines. The congresses accord with the exhibits, and the exhibits give expression to the congresses. Education has been the keynote of this Exposition. Were it not for the educational idea, the acts of government providing vast sums of money for the up-building of this Exposition would have been impossible. This congress reflects one idea vastly outstripping others, and that is, in the unity of thought in the universal concert of purpose. It is the first time, I believe, that there has been an international gathering of the authorities of all the sciences, and in that respect the congress initiates and establishes the universal brotherhood of scholars. A thought uncommunicated is of little value. An unrecorded achievement is not an asset of society. The real lasting value of this congress will consist of the printed record of its proceedings. The delivery of the addresses, reaching and appealing to, as must necessarily be the case, a very limited number of people, can be considered as only a method of reaching the lasting and perpetual good of civilization. In just the degree that this Exposition in its various divisions shall make a record of accomplishments, and lead the way to further advance, this enterprise has reached the expectations of its contributors and the hopes of its promoters. This congress is the peak of the mountain that this Exposition has builded on the highway of progress. From its heights we contemplate the past, record the present, and gaze into the future. This universal exposition is a world's university. The International Congress of Arts and Science constitutes the faculty; the material on exhibition are the laboratories and the museums; the students are mankind.