And so what happened is, in this case, all that energy was localized on the left side, but now the energy has equally dispersed so that we have an equal amount of energy on this side and an equal amount of energy on this side. So basically what the second law of thermodynamics tells us is when energy is given the chance to, it will disperse throughout all the space in which it actually exists. And what we can say is, we can say that energy always travels from a high amount to a low amount. So we have a low amount here, a high amount here. Energy will tend to move this way right from a high amount to a low amount until we reach thermal equilibrium, until the two sides have an equal amount of energy. And this describes the highest entropy, the highest mathematical probability of our system.