Hello, friend... We are consciousness having a human experience. Everything in this world is an elaborately simulated virtual reality. In order to experience infinite consciousness as if we were human, we must limit our consciousness. The human nervous system performs this role. It exists not to process information, but to limit the scope of conscious perception. So, you can either relax this nervous system by making it very tired, or you can temporarily suspend the restrictions on consciousness. For example, if you do very intensive meditation, your nervous system becomes overloaded and temporarily stops functioning, and in the process, you can temporarily feel a sense of unity with the universe. Or there are medications like ayahuasca. Alternatively, there is a machine in the laboratory that treats the brain with magnetic resonance, and when stimulated with gamma waves, it reports things like leaving the body or coming into contact with other beings. All of this requires the power of external tools, but there are also methods, such as holotropic breathing, that relax the nervous system by creating a temporary hypoxic state.