・Summary
A concrete is something tangible that can be seen, while an abstract is something formless that cannot be seen.
For example, "desk," "hand," and "book" are concrete. For example, "gratitude," "love," "heart," "trust," and "evil" are abstract. The "body" is concrete, but the "spirit" is abstract.
The visible is the lower dimension, and the invisible is the higher dimension. A single path is considered low dimensional, while a combination of many paths is considered high dimensional.
The human psyche has many paths. When the human psyche is sick, the integrator, which brings many paths together, is disturbed. When the human psyche is sick, the cognitive function of the concrete is also impaired.