But Lord Bacon, amongst other branches of knowledge which he considers ill-followed, makes especial mention of medicine, which he would submit to the same rules of observation and experiment laid down by him for the advancement of learning in general. With regard to it, as with regard to the discovery of all the higher laws of nature, he considers “that men have made too untimely a departure, and too remote a recess from particulars.” Men have hurried to conclusions, and then argued from them as from facts. Therefore let us have no traditional theories, and make none for ourselves but such as are revealed in the form of laws to the patient investigator, who has “straightened and held fast Proteus, that he might be compelled to change his shapes,” and so reveal his nature. Hence one of the aspects in which Lord Bacon was compelled to appear was that of a destroyer of what preceded. In this he resembled Cardan and Paracelsus who went before him, and who like him pulled down, but could not, like him, build up. He resembled them, however, in the possession of another element of character, namely, that poetic imagination which looks abroad into the regions of possibilities, and foresees or invents. But in the case of the charlatan, the vaguest suggestions of his mind in its favourite mood, is adopted as a theory all but proved, if not as a direct revelation to the favoured individual; while the true thinker seeks but an hypothesis corresponding in some measure to facts already discovered, in order that he may have the suggestion of new experiments and investigations in the course of his attempts to verify or disprove the hypothesis. Lord Bacon considered hypothesis invaluable in the discovery of truth, but he only used it as a board upon which to write his questions to nature; or, to use another figure, hypothesis with him is as the next stepping-stone in the swollen river, which he supposes to be here or there, and so feels for with his staff. But it must be proved before it be regarded as a law, and greatly corroborated before it be even adopted as a theory. Cardan and Paracelsus were destroyers and mystics only; they destroyed on the earth that they might build in the air: Lord Bacon united both characters in the philosopher. He looked abroad into the regions of the unknown, whence all knowledge comes; he called wonder the seed of knowledge; but he would build nowhere but on the earth--on the firm land of ascertained truth. That which kept him right was his practical humanity. It was for the sake of delivering men from the ills of life, by discovering the laws of the elements amidst which that life must be led, that he laboured and thought. This object kept him true, made him able to discover the very laws of discovery; brought him so far into _rapport_ with the heart of nature herself, that, like a physical prophet, his seeing could outspeed his knowing, and behold a law--dimly, it is true, but yet behold it--long before his