Now this weakness is a mental and moral sickness, pointing the way to mental and moral death. It has its source in a violation of that law which makes the health of the mind depend on its activity being directed to an object. When directed on itself, it becomes fitful and moody; and moodiness generates morbidness, and morbidness misanthropy, and misanthropy self-contempt, and self-contempt begins the work of self-dissolution. Why, every sensible man will despise himself, if he concentrates his attention on that important personage! The joy and confidence of activity come from its being fixed and fastened on things external to itself. "The human heart," says Luther,--and we can apply the remark as well, to the human mind,--"is like a millstone in a mill; when you put wheat under it, it turns, and grinds, and bruises the wheat into flour; if you put no wheat in, it still grinds on, but then it is itself it grinds, and slowly wears away." Now activity for an object, which is an activity that constantly increases the power of acting, and keeps the mind glad, fresh, vigorous, and young, has three deadly enemies,--intellectual indolence, intellectual conceit, and intellectual fear. We will say a few words on the operation of this triad of malignants. Montaigne relates, that, while once walking in the fields, he was accosted by a beggar of Herculean frame, who solicited alms. "Are you not ashamed to beg?" said the philosopher, with a frown,--"you who are so palpably able to work?" "Oh, Sir," was the sturdy knave's drawling rejoinder, "if you only knew how lazy I am!" Herein is the whole philosophy of idleness; and we are afraid that many a student of good natural capacity slips and slides from thought into reverie, and from reverie into apathy, and from apathy into incurable indisposition to think, with as much sweet unconsciousness of degradation as Montaigne's mendicant evinced; and at last hides from himself the fact of his imbecility of action, somewhat as Sir James Herring accounted for the fact that he could not rise early in the morning: he could, he said, make up his mind to it, but could not make up his body.