——Beauty is the element which is comprehended by all, and as we declare our enmity to the distorted picture-books, books of amusement, and to the mischievous character of "Compendiums," so we must also oppose the popular publications which style themselves _Science made Easy_, &c., in order to attract more purchasers by this alluring title. Kant in his _Logic_ calls the extreme of explanation Pedantry and Gallantry. This last expression would be very characteristic in our times, since one attains the height of popularity now if he makes himself easily intelligible to ladies——a didactic triumph which one attains only by omitting everything that is profound or complicated, and saying only what exists already in the consciousness of every one, by depriving the subject dealt with of all seriousness, and sparing neither pictures, anecdotes, jokes, nor pretty formalities of speech. Elsewhere Kant says: "In the effort to produce in our knowledge the completeness of scholarly thoroughness, and at the same time a popular character, without in the effort falling into the above-mentioned errors of an affected thoroughness or an affected popularity, we must, first of all, look out for the scholarly completeness of our scientific knowledge, the methodical form of thoroughness, and first ask how we can make really popular the knowledge methodically acquired at school, i.e. how we can make it easy and generally communicable, and yet at the same time not supplant thoroughness by popularity. For scholarly completeness must not be sacrificed to popularity to please the people, unless science is to become a plaything or trifling." It is perfectly plain that all that was said before of the psychological and the logical methods must be taken into account in the manner of the statement.——