I believe the spirit realm is like a holographic universe that exist within the connection between time and space which can appear in reality. Some of us are born with the ability to see, smell, hear and feel other realms or forms of reality or existence, consciousness or Spirit through our dreamstate or while awake. Some of us are born with or can develop these abilities over time. It’s how we see people channel messages from the divine.
Some of us may feel a tingling in our body, shivers on our skin, a voice calling off in the distance. These are all forms of spirit attempting to connect with us.