“A cross could be a shape for expressing something spacious; such as the coordinators of space. That could be called its first significance or its first relevance. A cross could equally stand for crossing something out. It could also be a sign of obstruction. An overturned cross, an X so to speak, could be the symbol of mystery, something for the other side. Then I could paint a cross in such a way that a connection is made between two bars, and in doing so convert it into a symbol of the unlimited. So, many different crosses and X symbols occur in my works. [quote from 1988]”