Quantum physics tells us about the most fundamental nature in physics, however it is presented in an abstract way. In classical mechanics, we can observe and relate its existence with day-to-day life, however it poses its own limitation when we apply to very small (sub atomic) things. When we apply quantum physics to large objects, such as planets or stars, it starts to become incompatible. Therefore, in order to qualify the ab initio model, we need a universal theory of physics (such as the GUT)