This monograph on the Romanian conceptual artist Miklos Onucsan (*1952) is an observation of his artistic practice over a period of four decades. The book's title is the result of Onucsan's Axiom (2005): "White becomes darker with wear, while black becomes lighter. That is why white is forever black and black is forever white." This transition between the states of objects and the modalities of their interpretations form one of the principles behind Onucsan's practice. The book Therefore white is black worn away for good and black is white worn away for good unites a range of essays by Sven Spieker, Magda Radu, Bogdan Ghiu, Mihnea Mircan, and Madalina Brasoveanu, as well as an interview with the artist. Text in English and Romanian