In his University lectures he distinguished æsthetic truth from logical truth in the style of Meier; even citing the example of the beautiful rosy face of a girl which, when seen distinctly, _i.e._ through a microscope, ceases to be beautiful.[3] It is æsthetically true (said he) that a man once dead cannot come to life again, although this is in opposition to logic and moral truth: it is æsthetically true that the sun plunges into the sea, but it is false logically and objectively. To what degree it is necessary to combine logical truth with æsthetic the learned have never yet been able to decide; not even the greatest æstheticians. In order to become accessible, logical concepts must assume æsthetic forms; a garb to be abandoned only in the rational sciences which seek profundity. Æsthetic certainty is subjective: it is content with authority, _i.e._ the citation of the opinions of great men. On account of our weakness, for we are strongly attached to the sensible, æsthetic perfection often helps us to render our thoughts distinct. In this, examples and images co-operate; æsthetic perfection is the vehicle for logical perfection; taste is the analogue of intellect. There are logical truths which are not æsthetic truths: and on the other hand we must exclude from abstract philosophy exclamations and other sentimental commotions proper to the other truth. Poetry is a harmonious play of thoughts and sensations. Poetry and eloquence differ in this: in the former, thoughts adapt themselves to sensations; in the latter the contrary is the case. In these lectures Kant sometimes taught that poetry is anterior to eloquence because sensations come before thoughts; and he observed (perhaps under Herder's influence) that the poetry of Eastern peoples, lacking concepts, is wanting in unity and taste although rich in imaginative detail. Poetry formed out of the pure play of sensibility is doubtless a possibility, _e.g._ love-poems: but true poetry disdains such productions, concerned as they are with sensations which every one knows ought to be expelled from our breasts. True poetry must strive to present virtue and intellectual truth in sensible form, as has been done by Pope in his _Essay on Man,_ in which he attempts to vivify poetry by means of reason. On other occasions Kant definitely says that logical perfection is the basis of every other, æsthetic perfection being merely an adornment of the logical; something of the latter may be omitted in order to appeal to the audience, but it must never be disguised or falsified.[4]