In speaking of sense-perception, Aristotle (De Anima, II. 12) makes use of his celebrated simile, which has so often occasioned misapprehension, because it has been understood quite incorrectly. His words are: “Sense-perception is the receiving of sensible forms without matter, as wax receives only the impress of the golden signet ring, not the gold itself, but merely its form.” For the form is the object as universal; and theoretically we are in the position, not of the individual and sensuous, but of the universal. The case is different with us in our practical relations, where the influence working upon us pre-supposes in return the contact of the material, for which reason, as Aristotle asserts, plants do not perceive (_supra_, p. 186). On the other hand, in receiving form, the material is lost sight of; for the receiving of form indicates no positive relation to the matter, which is no longer something offering resistance. If, therefore, sense-perceptions are termed in general sensuous impressions, we, in matter-of-fact fashion, do not get beyond this crude way of putting it; and in making the transition to soul, we take refuge behind popular conceptions, which are partly ill-defined Notions, and partly not Notions at all. Thus it is said that all sense-perceptions are impressed on the soul by external things, just as the matter of the signet ring works on the matter of the wax; and then we hear it alleged that this is Aristotle’s philosophy. It is the same with most other philosophers; if they give any sort of illustration that appeals to the senses, everyone can understand it, and everyone takes the content of the comparison in its full extent: as if all that is contained in this sensuous relationship should also hold good of the spiritual. No great importance is therefore to be attached to this conception, as it is only an illustration, professing to show by a side comparison that the passive element in sense-perception is in its passivity for pure form only; this form alone is taken up into the percipient subject, and finds a place in the soul. It does not, however, remain in the same relation to it as that in which the form stands to the wax, nor is it as in chemistry where one element is permeated by another as regards its matter. The chief circumstance, therefore, and that which constitutes the difference between this illustration and the condition of the soul is altogether overlooked. That is to say, the wax does not, indeed, take in the form, for the impression remains on it as external figure and contour, without being a form of its real Being; if it were to become such, it would cease to be wax; therefore, because in the illustration there is lacking this reception of form into the Being, no thought is given to it. The soul, on the contrary, assimilates this form into its own substance, and for the very reason, that the soul is in itself, to a certain extent, the sum of all that is perceived by the senses (_infra_, p.