The life of man has not extended with the extension of science. To multiply subjects was soon found equivalent to cheapening knowledge. Where three subjects are studied in place of one, each is pushed only one third as far. A crowded curriculum is a curriculum of superficialities, where men are forever occupied with alphabets and multiplication-tables,--elementary matters, containing little mental nutriment. Thoroughgoing discipline, the acquisition of habits of intellectual mastery, calls for acquaintance with knowledge in its higher ranges, and there is no way of reaching these remoter regions during the brief season of college life except by dividing the field and pressing along paths where personal friction is least. Accordingly, alternative options began to be allowed, at first between the new subjects introduced, then between these and the old ones. But in this inevitable admission of option a new principle was introduced whose germinal force could not afterwards be stayed. The old conception had been that there were certain matters a knowledge of which constituted a liberal education. Compared with the possession of these, the temper of the receiving mind was a secondary affair. This view became untenable. Under the new conditions, college faculties were forced to recognize personal aptitudes, and to stake intellectual gains upon them. In assessing the worth of studies, attention was thus withdrawn from their subject-matter and transferred to the response they called forth in the apprehender. Hence arose a new ideal of education, in which temper of mind had preëminence over _quæsita_, the guidance of the powers of knowing over the store of matters known. The new education has accordingly passed through two stages of development: first, in order to avoid superficiality when knowledge was coming in like a flood, it was found necessary to admit choice; secondly, in the very necessity of this admission was disclosed a more spiritual ideal of the relation of the mind of man to knowledge.