Let’s take a simple and brief philosophical approach to the following terms, ideas and concepts …

“Substance” means: “that which underlies all outward manifestations; the essence; the essential reality; the thing in itself,”

“Reality” means: “the state of being real; true, enduring; valid; fixed; permanent; actual,”

“Substantial” means: “actually existing; being the essential element; being real,”

“Under, and back of, the Universe of Time, Space and Change, is ever to be found The Substantial Reality — the Fundamental Truth.” — The Kybalion.

“While All is in THE ALL, it is equally true that THE ALL is in All. To him who truly understands this truth hath come great knowledge.” — The Kybalion

“Under and behind all outward appearances or manifestations, there must always be a Substantial Reality. This is the Law. Man considering the Universe, of which he is a unit, sees nothing but change in matter, forces, and mental states. He sees that nothing really IS, but that everything is BECOMING and CHANGING. Nothing stands still-everything is being born, growing, dying-the very instant a thing reaches its height, it begins to decline-the law of rhythm is in constant operation-there is no reality, enduring quality, fixity, or substantiality in anything – nothing is permanent but Change. He sees all things evolving from other things, and resolving into other things-a constant action and reaction; inflow and outflow; building up and tearing down; creation and destruction; birth, growth and death. Nothing endures but Change. And if he be a thinking man, he realizes that all of these changing things must be but outward appearances or manifestations of some Underlying Power-some Substantial Reality.” — The Kybalion