The mind, intelligence and spirit are words that we come across everyday. They sometimes bring confusion because no one seems to get their definition, meaning and correlation.

The mind is a concept less understood by many people. Unlike popular belief, the mind is not a substance and cannot be studied empirically. The mind would be individual if it were a substance. The mind thus could be defined as the collection of diverse processes that allow empirical study. The processes are what we call mental processes. These mental processes are of various classes. They include perceptions, memories, beliefs and plans. This mean we can see and touch, keep memories of things past, develop certain beliefs about people and things and finally expect what to do to achieve what we want.

The mind is not exclusive to humans alone. There is animal mind and mechanical mind found in robots and machines, which have sensations and memories. Nevertheless, it is worth noting that the human mind is the paradigm of mind. The mind of animals and robots is referred in analogy to the human mind. Though machines have a mind, their mental processes are not because of neurological processes.

Intelligence on the other hand is a class of processes. Thus, it is best to say that a person, an animal or a machine has intelligent processes rather than saying such possess intelligence. Intelligent processes are one class of the many classes of intelligent processes. This means the mind becomes the genus and intelligence becomes a species of the genus so that an intelligent process is a mind process. However, this does not validate that every mental process is an intelligent process. Intelligent processes are contextual. They are best understood where there is a context of application.

The spirit is another notion of the dualism of human existence. On one hand, we have actual life here on earth and on the other hand, there is that which want to become after death. Spirit means the one who breathes and the breath itself. We can therefore determine that this is the substance of life that is non-physical or that exceeds physical causes. All life hails from the spirit. The spirit refers to the spiritual processes that bear no natural causation. There are various examples of spiritual processes such as self-consciousness and free volitions. In conclusion, the mind, intelligence and spirit are intertwined.