The nondefinable, inaccessible and indefinite, the nonexistent is what he wants to bring into today. Joseph Beuys said, "I came to the conclusion that there is not a single way to do something for people than out of the arts. For this I need an educational conception and I need an epistemological conception and I have to act. So there are three things that belong under one roof. "While J. Beuys researched things for the evolution of his" social sculpture, "social consciousness, Liedtke develops the epistemological conception, the pedagogical conception, and acts accordingly. Liedtke introduces the fluid transition from "social sculpture" into concrete evolution.

Prof. Karl Ruhrberg

Art book author and former director of the Museum Ludwig Cologne and the Kunsthalle Düsseldorf