The piece is about accelerating. A Catalyst is something that causes an event to happen. It can accelerate the interaction between two objects or simply affect the way they interact in endless forms. Unlike other reagents that participate in the reaction, a catalyst is not consumed. Thus, the catalyst may participate in multiple transformations, although in practice catalysts are secondary processes. The piece takes two musical materials to interact, and then use energy as a "catalyst". If this catalyst does change the equilibrium, then it must be consumed as the "reaction" proceeds, and thus it is also a reactant.