Bacon likewise treated the sciences methodically; he did not merely bring forward opinions and sentiments, he did not merely express himself regarding the sciences dogmatically, as a fine gentleman might, but he went into the matter closely, and established a method in respect of scientific knowledge. It is only through this method of investigation introduced by him that he is noteworthy—it is in that way alone that he can be considered to belong to the history of the sciences and of philosophy. And through this principle of methodical knowledge he has likewise produced a great effect upon his times, by drawing attention to what was lacking in the sciences, both in their methods and in their content. He set forth the general principles of procedure in an empirical philosophy. The spirit of the philosophy of Bacon is to take experience as the true and only source of knowledge, and then to regulate the thought concerning it. Knowledge from experience stands in opposition to knowledge arising from the speculative Notion, and the opposition is apprehended in so acute a manner that the knowledge proceeding from the Notion is ashamed of the knowledge from experience, just as this again takes up a position of antagonism to the knowledge through the Notion. What Cicero says of Socrates may be said of Bacon, that he brought Philosophy down to the world, to the homes and every-day lives of men (Vol. I. p. 389). To a certain extent knowledge from the absolute Notion may assume an air of superiority over this knowledge; but it is essential, as far as the Idea is concerned, that the particularity of the content should be developed. The Notion is an essential matter, but as such its finite side is just as essential. Mind gives presence, external existence, to itself; to come to understand this extension, the world as it is, the sensuous universe, to understand itself as this, _i.e._ with its manifest, sensuous extension, is one side of things. The other side is the relation to the Idea. Abstraction in and for itself must determine and particularize itself. The Idea is concrete, self-determining, it has the principle of development; and perfect knowledge is always developed. A conditional knowledge in respect of the Idea merely signifies that the working out of the development has not yet advanced very far. But we have to deal with this development; and for this development and determination of the particular from the Idea, so that the knowledge of the universe, of nature, may be cultivated—for this, the knowledge of the particular is necessary. This particularity must be worked out on its own account; we must become acquainted with empirical nature, both with the physical and with the human. The merit of modern times is to have accomplished or furthered these ends; it was in the highest degree unsatisfactory when the ancients attempted the work. Empiricism is not merely an observing, hearing, feeling, etc., a