The exhibition provides an overview of his work over the past ten years. Rust studied at the Kunstakademie Münster from 1975 to 1982 and was himself Professor of Aesthetics and Communication at Bielefeld University of Applied Sciences from 2001 to 2016.

Rust has named the theme of this exhibition "source code", referring not only to the origin of digital codes but also to his own pictorial program, in which he juxtaposes the world of plants and the free use of color with the structures and algorithms of the virtual world. Source code is thus also a painterly self-image.

He refers to the Expressionist Romantic Franz Marc, who at the beginning of the last century and in the early days of modernism said that painting means transferring things to another place. Marc meant to take them to their spiritual place, to their true being, which lies hidden in the accidental shell of their appearance and which artists have to work out as their essence. Many of the pictures in the exhibition also reflect the contemporary contradictions of our society, including the puzzle picture "NSU - the grass grows..." Only at second glance does the viewer recognize the swastika half-hidden under bamboo leaves.

Christoph Rust has also designed several spatial installations especially for the exhibition at Salder Castle, including the large floor work "Delta" and a multi-part installation for the staircase to the upper floor.