A system spontaneously transitions into a system with increasing entropy. Thus, the particles involved in the system must have a preferred direction without any external agent. Newton’s law suggest that a self-evolving system must lose energy due to energy dissipation within, hence the system should become stagnant and more organised. However, the law of entropy says the system should have more microstates and thus a larger entropy. We need to learn the entropy-energy balance to know the evolution of a system.