"Liedtke lives with a special, distinct consciousness, which Jürgen Kaube describes in "Hegel's World" (Berlin, 2020) in reference to the great philosopher Hegel as "Könnensbewusstsein". " "Liedtke is a unique figure in the world of culture, who always sets new impulses. He seeks to introduce the new seeing into history as an orientation for the future, which at the same time involves a confrontation, not to say a struggle,  against the traditional, socially conditioned outdated forms, on which a society normally hangs. “ 

Prof. Dr Dieter Ronte, Bonn 2020 
Director Museum of Modern Art Vienna,
Sprengel Museum Hanover, Kunstmuseum Bonn 
Art historian / consultant of the new international travelling art exhibition: i = E = MC²