Planes are a complicated area of study called esotericism. Esotericism is the study of things that are hidden or obscure, and is often connected with magic, mysticism, and other things that aren't widely accepted as real. To understand planes, think of the world like a big, invisible painting. Planes represent different levels of this painting, and each one exists on a different level of consciousness. For example, the physical plane is the one we interact with in our everyday life. The astral plane is the one full of thoughts, ideas, and emotions, and the spiritual plane is all about an understanding of the universe and our connection to it.