In a podcast in danish I argue about the delineation between a rigid, sceptical, metaphysical idealism and when that idealism tends to end up with mysticism.
The "weakness" (so to say) is that idealism leaves a "large" unknowable "space" where individuals who want to inject their supernatural beliefs can roam free.
But since philosophy in the end deals with what is knowable, a metaphysical realm that is impenetrable by the senses cannot be known either. To paraphrase Socrates ... "The only thing I know is what I experience".
