Sublime and Subliminal

Though virtually identical in appearance, 'sublime' and 'subliminal' have almost diametrically opposed meanings--'exalted' vs. 'below a threshold'.  Now, as deriving from 'sub' and 'limit', the latter seems etymologically correct.  In contrast, as Kant's uncontroversial characterization of the former--'exceeding the capacity of the imagination'--suggests, 'super-lime' would be more accurate.  Furthermore, standard use of 'sublime' precedes Kant's, not only in English, e. g. Burke's, but in the original Latin itself.  So, regardless of the context--casual, rigorous, Latin, German, English, ancient, modern--that use seems completely, and inexplicably, at odds with its literal meaning.