To me Rudolf Steiner has made the connection between the physical, spiritual, and metaphyical/soul theories.
Thus we have to distinguish between three lower and three higher regions of the soul-world; and these two are linked together by a fourth, so that there results the following division of the soul-world:
Region of Burning Desires.
Region of Flowing Susceptibility.
Region of Wishes.
Region of Attraction and Repulsion.
Region of Soul-Light.
Region of Active Soul-Force.
Region of Soul-Life.
What Steiner is getting at, is the human being is separated into the body, soul, and spirit. Body is composed of the physical things of mineral, plant, atoms, and etc. Our sense organs allow us to function in reality, these give us a scope into learning how to interact with other things in reality. Soul, or as I see it, the subconscious mind collects and keeps the knowledge we attain through interacting in the world. The different levels within the subconscious are listed above. This is where the drive to do things, to become things, and create. It has been compared to Freud’s Id understanding. When compared to Hindu forms of enlightenment, their are similar connections to that and Kudalini levels of understanding as well.
Steiner says that the physical being will reach a growth peak, which is true, where the Soul and Spirit self can continue to grow. They have to be nurtured as the physical self does. This is through attaining the goals and desires set forth by the subconscious mind. The soul and body are highly interconnected even through death. The theory being that the soul, which is connected to the spirit, takes time to realize that it is no longer receiving the feed back from the body.
The spirit is the piece that is connected to the other spiritual side. The common term is the Astro Relm, or you see a Jewish systematical approach known as the Qabalah. There are other spiritual methods getting to this spiritual found in using sigiliums or sigils. Then there are the meditative/trance approaches seen in Hindu and Voodoo/Hoodoo. Those methods are usually used to make contact with spiritual being within the Aether/soul land. Having awakened the soul/spirit so that one can interact within the layers of Aether, gives one the spiritual intuition to be able to interact with spiritual beings and to gain certain unseen insight about persons, events, or things in the physical world. Per Steiner, any educated or uneducated person can open this up within themselves.
Accordingly, the threefold world falls into the following divisions: 1. The kingdom of the archetypal formless beings (First Elemental Kingdom); 2. The kingdom of the form-creating beings (Second Elemental Kingdom); 3. The kingdom of the soul-beings (Third Elemental Kingdom); 4. The kingdom of the created forms (crystal forms); 5. The kingdom that is perceptible to the senses in forms, but in which the form-creating beings are also working (Plant Kingdom); 6. The kingdom which is sensibly perceptible in forms, upon which, however, there work in addition the form-creating beings, and also the beings that are active in soul (Animal Kingdom); 7. The kingdom in which the forms become sensibly perceptible, but upon which work not only the form-creating beings and the beings that expend their activities in soul-life, and in which the spirit itself takes shape in the form of thought within the world of the senses (Human Kingdom.)
“From this it can be seen how the basic constituents of the human being living in the body are connected with the spiritual world. The physical body, the ether-body, the sentient-soul-body, and the intellectual-soul, are to be regarded as archetypes of the “Spiritland” condensed in the sensible world. The physical body comes into existence through the fact that the archetype of man becomes densified to the point of sensible appearance. For this reason one can call this physical body also a being of the First Elemental Kingdom, densified to sensible perceptibility. The ether-body comes into existence by the form that has arisen in this way, having its mobility maintained by a being that extends its activity into the kingdom of the senses, but is not itself visible to the senses. If one wishes to characterise this being fully, one must say it has its primal origin as a spirit-germ in the highest regions of the “Spiritland” and then shapes itself in the second region into an archetype of life. It works in the sensible world as such an archetype of life. In a similar way, the being that builds up the sentient-soul-body has its origin in the highest regions of the “Spiritland,” forms itself in the third region of the same into the archetype of the soul-world and works as such in the sensible world. But the intellectual soul is formed by the spirit-being of man, who in the fourth region of the “Spiritland” shaped itself into the archetype of thought and, as such, acts directly as thinking human being in the world of the senses. Thus man stands within the world of the senses; in this way his spirit works on his physical body, on his ether-body and on his sentient-soul-body. Thus this spirit comes into manifestation in the intellectual soul. Archetypes, in the form of beings who in a certain sense are external to man, work upon the three lower members of his being; in his intellectual soul he himself becomes a conscious worker on himself. And the beings that work on his physical body are the same as those that form mineral nature. On his ether body work beings of the kind that live in the plant kingdom, on his sentient-soul-body work beings such as live in the animal kingdom; both are imperceptible to the senses but extend their activity into these kingdoms. Thus do the different worlds work together. The world in which man lives is the expression of this collaboration.” Steiner, Rudolf Theosophy
Your spiritual path can lead you to the awakening of this spiritual understanding if you stick to it. Just realize that majority of spiritual paths are linked into a religion. This religions methods will shape you to function with in its scope of the perceived view of the particular religion. Should you wish to know that aspect, read their mythology. That will lead you to understand what Spiritual Archetypes that you will run into and work with in the Spirit Land.