A material way to define the Spirit-Within and the Soul-Within

If we want to consider a material dwelling place for the Spirit and Soul within, after centuries of mystics talking about them as non-material, the left brain might represent where the Soul is, which is the language and symbol side of the brain, the Apollonian brain, representing the Soul not the Spirit. The Spirit, which is also material, is represented in the right brain, the artistic, intuitive, even Dionysian brain, which could be called the Spark of the Soul since that is what it does in activating life, perhaps in all the cells of the body, to evolve toward Godhood.. Both “brains” work together in first seeing and experiencing God, the Father Within, symbolically, and later in attaining real Godhood through material evolution.

The Soul-Within could be called the Zenith of the mind and as such it is probably represented in the prefrontal cortex, not the limbic system that is blocked by mystics in order to "see" the Soul. We could say that the Spirit is represented in the right brain, which is the Zenith of the Soul, and activates both the Inward Path of the Soul and the Outward Path of the Spirit. The Soul and Spirit must then interact with outside natural evolution on the path of the material evolution of life toward supermaterial Godhood.
 

This allows a rational way to retain the Soul and Spirit of traditional religion, which is conservatively desired in theological materialism, and is seen in the Twofold Path.

In the Twofold Path, involutionary traditional religion is represented in the Inward Path to the symbolic God-Within, the first way humans saw God, and the Outward Path represents the evolution of material life to real, not symbolic, supermaterial Godhood, in the distant future.