You experience the world through your mind. You are just a physical being that exists within that world. All is within us. There is no external world beyond our perceptions. There is only consciousness.
You can think that everything you see is really there; you can feel that everything you touch feels real; you can smell that something is really there. This is your personal world.
You can think that your brain is not in the process of making sense of your reality but just doing its job, and that there is something out there that is real. This is the world that we experience.
However, all of those beliefs and all of those perceptions are all merely our projections.
Our projections make sense when we see and when we hear something, but they have no basis in reality. Our perceptions are merely thoughts that are trying to be reality.