_The first Cause considered._--The _nature of the science_ is such that its benefits are not immediately apparent. The dullest mind can perceive some use in chemistry, or botany, or natural philosophy. They are of service in the analysis of soils, the rotation of crops, the comprehension of the laws of mechanical and chemical forces. But mental science has no such application, no such practical results patent and obvious to the careless eye. Its dwelling-place and sphere of action lie removed somewhat from the observations of men. It has no splendid cabinets or museums to throw open to the gaze of the multitude. It cannot arrange in magnificent collection all the varieties of mental action, all the complications of thought and feeling as yet observed, nor illustrate by curious instruments, and nice experiments, the wonderful laws of association, the subtle changes and swift flashes of wit and fancy, and quick strong emotion, the impulses of desire, the curious play of volition, the unexplained mystery of thought, the lights and shadows that come and go upon the field of consciousness. For these curious and wonderful phenomena of the inner life there are no philosophic instruments or experiments, no charts or diagrams. Nor are there yet brilliant discoveries to be made, nor splendid rewards to be gained by the votaries of this science. "Four or five new metals," says Sydney Smith, "have been discovered within as many years, of the existence of which no human being could have had any suspicion; but no man that I know of pretends to discover four or five new passions." _The second Cause._--But the chief obstacle, as I suppose, to the more general cultivation of mental science is to be found in the exclusively practical tendencies of the age. We are a people given more to action than to thought, to enterprise than to speculation. This is perhaps inseparable from the condition of a new state. An age of action is seldom an age of reflection. External life demands the energies of a new people. The elements are to be subdued, mountains levelled, graded, tunnelled, roads constructed, cities built, and many useful, necessary works to be wrought with toil and cost, before that period comes of golden affluence, and leisure, and genial taste, and elegant culture, that can at once appreciate and reward the higher efforts of philosophic investigation.