That which can affect our senses in any manner whatever, is termed matter.

Today I realized that all matter is merely energy condemnced to a slow vibration. That we are all one consciousness experiencing itself subjectively, there is no such thing as death, life is only a dream, and we are the imagination of ourselfs. Brothers and sisters, friends and neighbors, vibrations in the mind of the one true god, whose name is Love.

Matter is spirit named.

Without a subject there is no object in the world, without understanding there is nothing to understand, without mind no matter. You think that matter comes first, and then what we call mind. Where is this matter? Where have you ever seen matter? You see oak, fir, slate, and granite, and all sorts of other materies, as the old architects called them, never matter. Matter is the creation of the mind, not the reverse. Our entire world is thought, not wood and stone. We learn to think or reflect upon the thoughts, which the Thinker of the world, invisible, yet everywhere visible, has first thought. What we see, hear, taste, and feel, is all within us, not without. Sugar is not sweet, we are sweet. The sky is not painted blue, we are blue. Nothing is large or small, heavy or light, except as to ourselves. Man is the measure of all things, as an ancient Greek philosopher asserted; and man has inferred, discovered, and named matter. And how did he do it? He called everything, out of which he made anything, matter; materia first meant nothing more than wood used for building, out of which man built his dwelling. Here you have the whole secret of matter. It is building-material, oak, pine, birch, whichever you prefer.

As a man who has devoted his whole life to the most clearheaded science, to the study of matter, I can tell you as a result of my research about the atoms this much: There is no matter as such! All matter originates and exists only by virtue of a force which brings the particles of an atom to vibration and holds this most minute solar system of the atom together. . . . We must assume behind this force the existence of a conscious and intelligent Mind. This Mind is the matrix of all matter.

There is no such thing as immaterial matter. All spirit is matter, but is more fine or pure, and can only be discerned by purer eyes. We cannot see it, but when our bodies are purified, we shall see that it is all matter.

Matter is composed chiefly of nothing.

Some people worry that to say we are nothing but matter is to deny that we think or feel. It’s not. The strange fact is that, when suitably arranged, matter thinks and feels.

The ancient intuition that all matter, all “reality,” is energy, that all phenomena, including time and space, are mere crystallizations of mind, is an idea with which few physicists have quarreled since the theory of relativity first called into question the separate identities of energy and matter. Today most scientists would agree with the ancient Hindus that nothing exists or is destroyed, things merely change shape or form; that matter is insubstantial in origin, a temporary aggregate of the pervasive energy that animates the electron. … The cosmic radiation that is thought to come from the explosion of creation strikes the earth with equal intensity from all directions, which suggests either that the earth is at the center of the universe, as in our innocence we once supposed, or that the known universe has no center. Such an idea holds no terror for mystics; in the mystical vision, the universe, its center, and its origins are simultaneous, all around us, all within us, and all One.

I do not profess to know what matter is in itself, and feel no confidence in the divination of those esprits forts who, leading a life of vice, thought the universe must be composed of nothing but dice and billiard-balls. I wait for the men of science to tell me what matter is, in so far as they can discover it, and am not at all surprised or troubled at the abstractness and vagueness of their ultimate conceptions : how should our notions of things so remote from the scale and scope of our senses be anything but schematic ? But whatever matter may be, I call it matter boldly, as I call my acquaintances Smith
and Jones without knowing their secrets : whatever it may be, it must present the aspects and undergo the motions of the gross objects that fill the world : and if belief in the existence of hidden parts and movements in nature be metaphysics, then the kitchen-maid is a metaphysician whenever she peels a potato.

"What is the world of the spirits? It is nothing I know about. I don't know what spirit is."
"Spirit is what matter does."

Energy is liberated matter, matter is energy waiting to happen.

Matter is spirit moving slowly enough to be seen.

There is neither spirit nor matter in the world; the stuff of the universe is spirit-matter. No other substance but this could produce the human molecule. I know very well that this idea of spirit-matter is regarded as a hybrid monster, a verbal exorcism of a duality which remains unresolved in its terms. But I remain convinced that the objections made to it arise from the mere fact that few people can make up their minds to abandon an old point of view and take the risk of a new idea. ... Biologists or philosophers cannot conceive a biosphere or noosphere because they are unwilling to abandon a certain narrow conception of individuality. Nevertheless, the step must be taken. For in fact, pure spirituality is as unconceivable as pure materiality. Just as, in a sense, there is no geometrical point, but as many structurally different points as there are methods of deriving them from different figures, so every spirit derives its reality and nature from a particular type of universal synthesis.