Popular instruction is compatible with this freedom. By the term popular speakers or popular writers I imply all those who do not direct their remarks exclusively to the learned. Now, as these persons do not address any carefully trained body of hearers or readers, but take them as they find them, they must only assume the existence of the general conditions of thought, only the universal impulses that call attention, but no special _gift of thinking_, no acquaintance with distinct conceptions, nor any interest in special subjects. These lecturers and authors must not be too particular as to whether their audience or readers assign by their imagination a proper meaning to their abstractions, or whether they will furnish a proper subject-matter for the universal conceptions to which the scientific discourse is limited. In order to pursue a safer, easier course, these persons will present along with their ideas the perceptions and separate cases to which they relate, and they leave it to the understanding of the reader to form a proper conception impromptu. Accordingly, the faculty of imagination is much more mixed up with a popular discourse, but only to _reproduce_, to renew previously received representations, and not to _produce_, to express its own self-creating power. Those special cases or perceptions are much too certainly calculated for the object on hand, and much too closely applied to the use that is to be made of them, to allow the imagination ever to forget that it only acts in the _service of the understanding_. It is true that a discourse of this popular kind holds somewhat closer to life and the world of sense, but it does not become lost in it. The mode of presenting the subject is still _didactic_; for in order to be beautiful it is still wanting in the two most distinguished features of beauty, sensuousness of expression and freedom of movement. The mode of presenting a theme may be called free when the understanding, while determining the connection of ideas, does so with so little prominence that the imagination appears to act quite capriciously in the matter, and to follow only the accident of time. The presentation of a subject becomes sensuous when it conceals the general in the particular, and when the fancy gives the living image (the _whole_ representation), where attention is merely concerned with the conception (the part representation). Accordingly, sensuous presentation is viewed in one aspect, _rich_, for in cases where only _one_ condition is desired, a complete picture, an entirety of conditions, an individual is offered. But viewed in another aspect it is _limited and poor_, because it only confines to a single individual and a single case what ought to be understood of a whole sphere. It therefore curtails the understanding in the same proportion that it grants preponderance to the imagination; for the completer a representation is in substance, the smaller it is in compass.