Percy Bysshe Shelley,
The Prose Works of Percy Bysshe Shelley
(1880)
“ The caverns of the mind are obscure, and shadowy; or pervaded with a lustre, beautifully bright indeed, but shining not beyond their portals. If it were possible to be where we have been, vitally and indeed—if, at the moment of our presence, we could define the results of our experience,—if the passage from sensation to reflection—from a state of passive perception to voluntary contemplation, were not so dizzying and so tumultuous, this attempt would be less difficult. ”
