Tau

"I use angles that are derived from different solids. When they go together, they do not follow any internal system. I assemble them, you might say, in capricious ways rather than systematic ways. You have to take each plane as it comes and find out in what ways it will join other planes," (T. Smith, quoted in R. Storr, "A Man of Parts," Tony Smith: Architect, Painter, Sculptor, New York, 1998, p. 27).