An interactive model of the empirical soul has been presented in this chapter. The bhava karma of the soul is linked to dravya karma of the karman body by the principle of parallelism. Dravya karma is linked to the gross body through radiations, adhyavasaya and lesya. The three units behave as a system. The concept of faculty has been presented to clarify the process of interaction between the soul and dravya karma, and the manifested intelligence of the soul. The intelligence of the soul is reflected in the dravya karma through temporal changes in the karma states. The faculty of the soul in its worldly existence has been defined as an intelligent physical force expressed through karma radiations. Eight faculties, four psychical and four biological, have been defined based on the eight types of karma. The biological faculties, unaffected by the mind, work on an involuntary basis to regulate the biological processes of an organism. Examples of intelligent biological processes discovered by scientists have been described in brief and these have been shown to be guided by the manifested intelligence of the soul through the biological faculties. The manifested intelligence of the soul thus regulates the biological activity carried out by the genes. Thus, the soul and matter together manage and operate the organic system of life. The soul responds intelligently to artificial changes in the body.
Biological structures have been classified based on how the soul's intelligence is used, and it is shown that there are many possibilities for the production of artificial biological structures by employing the human mind. All such structures are essentially a product of human intelligence. The claims that modern science has advanced new understandings of nature and the biological processes of organisms must be seen as an outcome of the application of human psychical faculties, which represent only a small fraction of the total potential intelligence of the soul. The full potential is realized in the omniscient state and it is not difficult to imagine that the Omniscient possesses infinite knowledge.