Internal organs are located inside the subtle body. They are: Intelligence, I-principle, and Mind. They act in all three times: past, present, and future. They have the ability to analyze things that happened in the past, and that may happen in the future. The external organs work only at present time. External organs are sense organs and action organs.
The purpose of the organs is for the soul to experience the enjoyment and eventually lead to emancipation. Total number of organs is 13. All sense organs are capable of sensing both subtle and gross elements. But the ordinary people can only sense gross elements. Intelligence presents the experiences to the soul. It is the intelligence that can distinguish between the root material (prakrti) and the root cause (soul).
Every feeling is created by a combination of the three gunas, characteristics, or properties. When a person is feeling very happy he has Sattava in very high percentage and other two are in low proportions. Same is true for all other various types of feelings. These three gunas are always in a dynamic state.
It is the first internal organ that is created during the creation process.
The I-Principle or Ahamkara in Sanskrit is created by the intelligence. The synonyms for the I-Principle are ego, self-consciousness etc.
Self-assertion: are like ‘I am entitled’, ‘I am competent to do this’, ‘all these objects are for me’ etc.
Mind is the third organ created in the process after Intelligenec and I-Principle.
Mind has a deliberating capacity. This means when mind sees a rope and vaguely thinks it may be a snake, then mind analyzes past knowledge, other information, and concludes that it is not a snake but a rope instead.
In Samkhya Karika the mind is defined as an organ. It is both a sense organ as well as an action organ; because it has similarities with these organs. Mind cooperates with these organs to make them work. There are 11 organs, 5 sense organs, 5 action organs and 1 mind. All 11 organs are created by the I-Principle and all of them have abundance of Sattava properties. The main function of the mind is observational.
The soul makes all the organs, including the mind, to work. No other motive can operate the organs. Mind is like the CEO, it works with all sense organs. All sense organs send information to mind for decision making. It is also like an operating system executive, which plays the same role of CEO.