Keats Against "Cold Philosophy"

...Do not all charms fly At the mere touch of cold philosophy? There was an awful rainbow once in heaven: We know her woof, her texture; she is given In the dull catalogue of common things. Philosophy will clip an Angel’s wings, Conquer all mysteries by rule and line, Empty the haunted air, and gnomed mine - Unweave a rainbow, as it erewhile made The tender-person’d Lamia melt into a shade.

 Analysis of the Transformation of Lamia

This extraordinary creation is both sexually alluring and yet clearly menacing and ‘demonic’. By using the term ‘rainbow-sided’ of her body, Keats even seems to be recalling his old Newtonian joke, and inventing his own mysterious biological rainbow, a living creature who is both a spectre and a spectrum. There are many other passages which play with medical and scientific imagery in the poem — for example Hunter’s theory of ‘inflammation’ as proof of vitality. When Lycius des...