The sufficient reason why the common developments of intellect are so poor, is not so much in the want of native capacity, as in the low moral estate of our nature. Our hearts are so dry, our better affections so dull, that we are not the subjects of stimulus adequate to the calling forth of efforts suitable to the necessities of the case. Here and there, one is so richly endowed in mind, that his love of science or art may suffice to tax his powers to the full: but a world could never be constituted of such geniuses. The mass of men, if ever to be led up to any high plane of mental life, must be so under the promptings of affections and passions which find their excitement in the more practical spheres of our existence.