People can also be divided, intellectually, into two other classes, the theoretical and the practical. The man with a theoretical intellect is thoughtful, meditative, reflective. His mind works slowly; it is interested in philosophy, in theories, in abstractions, and is capable of dealing with them. On the other hand, it is not particularly well qualified for observing practical things, and for making a practical application of the theories it learns so easily and in which it takes so great an interest. This is the intellect of the philosopher, the dreamer, the educator, the preacher, the writer, the reformer, the poet. This is particularly the intellect of reason, of logic, of ideas and ideals. Whether found amongst the world's leaders or in the lowliest walks of life, its function is always that of dealing with theory, finding out reasons, putting together logical arguments, teaching others and dealing with abstractions. Oftentimes this type of intellect is so impractical that its possessor never possesses anything else. Literature abounds in the tragic tales of philosophers, poets, reformers, and dreamers who starved beautifully and nobly. Every-day life sees thousands more blundering along, either cursing their luck or wondering why Providence withholds its material gifts from people so deserving as they. Over against this is the practical, matter-of-fact, analytical intellect--the intellect which demands facts and demands them quickly; the intellect which is quick in its operations, impatient, keen, penetrating, intolerant of mere theories and abstractions, not particularly strong in reason and logic, but exceedingly keen and discriminating in regard to the facts. This is the intellect which deals with things, with the material universe, with laws and principles, based upon accurately determined facts. This is the intellect of the preeminently practical man. Some intellects are particularly fine in critical powers; some have splendid financial ability; some are artistic and musical; some have almost miraculous instinct in mechanical affairs; some are scientific; others are mechanical; still others are inventive. There are many intellects, of course, which combine two or more of these qualities, as, for instance, an intellect blessed with both financial and organizing ability. This is the intellect of the captain of industry, of the multi-millionaire. Then there is the intellect which combines financial, inventive, and organizing ability. This is the intellect of Edison, of Westinghouse, of Curtis, of the Wright brothers, of Marconi, and of Cyrus McCormick. Herbert Spencer was blessed with an intellect capable of both philosophic and scientific thought, both theoretical and practical. Spencer had also great organizing ability, but he devoted it to the organizing of a system of philosophy based upon his scientific researches. EMOTIONAL REQUIREMENTS