What always attracted Karel in painting and Plastic arts is the way art “makes visible” things and ideas that are “not visible” as such in the simple visible world but which “appear” by some sort of magic in the minds of the viewer. It took him over twenty years to sort out the difference between “symbols” (a “convention” accepted among a group or a code system designed to communicate a secret meaning), and “metaphor” which, by assembling things unusual, by irony and paradox, allows the individual mind to “discover” the meaning the painter intended to transmit.