Yet under this diversity it is always possible to detect a unity both of purpose and of effect. In the first place, there is the unity of Carlyle's own character. Everything he wrote was self-revealing; and it is scarcely too much to say that his whole works are an expansion and, as circumstances demanded, a modification, of the autobiographic _Sartor Resartus_. We see this in many ways. Carlyle is best when the conditions under which he works are such as to allow himself to appear freely, naturally, spontaneously, without fierce invectives and exaggeration. This, in his case, generally implies similarity without personal contact, or with contact from which the aspect of possible competition is removed. He is worst of all where there is a partial similarity without sympathy. Thus, the best perhaps of Carlyle's literary essays is that on Burns; and the reason why it is best is that Burns was in some ways so like himself. Both sprang from the Scottish peasantry, and the minds of both were deeply coloured by the experiences of their early youth. In writing of Burns and his father, Carlyle never forgets himself and his own father. On the other hand, the essay on Scott is certainly among the worst of his essays, just because Scott is at once too near to him and too far from him. Scott belonged to a different class in society, pursued different aims, and had a widely different literary history from Carlyle. Yet both were Scotch, and in the blood which they inherited as well as in the mental and moral food on which they were nourished there was much to bring them together. The same contrast is illustrated by the _Reminiscences_. There, every reference to his own family is distinguished by clear comprehension and profound sympathy; while, unfortunately, nearly every reference to contemporaries not related to him by blood is disfigured by acrimony and depreciation. In the _Life of Sterling_ friendship performs the function which blood-relationship performs in the _Reminiscences_. The essays on foreign writers, both French and German, deal with men much farther removed from Carlyle than Scott was; and if they have not that depth of sympathy and that fineness of perception which are the charm of the essay on Burns, they are free from the bitterness and ungenerous depreciation which mar the essay on Scott. Take, for example, Carlyle's treatment of Goethe. In many ways the great German was almost as far removed as it was possible to be from his Scotch disciple. Yet Carlyle's comprehension is clear, his appreciation ready, his criticism wise. We see himself in it all, but just because of their wide differences his own image never blurs that of Goethe.