The error lies in seeking to understand the world in terms of things rather than events. It lies in ignoring change. The physics and astronomy that will work, from Ptolemy to Galileo, from Newton to Schrödinger, will be mathematical descriptions of precisely how things change, not of how they are. They will be about events, not things. The shapes of atoms will be eventually understood only with solutions to Schrödinger’s equations describing how the electrons in atoms move. Events again, not things.