In plain words
The Ātma joined with the awareness of the mind has been called the mind-puruṣa. Mental consciousness. Then the fourth is of a form beyond the human. Its name is the state of the transcendent mind. The consciousness joined with the state of the transcendent mind has been called the superhuman form. The Vedas and the Upaniṣads have gone on describing it in many ways. They have also called it ‘Bṛhat’. They have called it ‘Ṛtam’. They have called it ‘Satyam’. Such a transcendent state of the puruṣa, whose form is beyond the mind, they have gone on recognising as divinity. This transcendent one is called Super mind; such a Supermind principle they have called the vijñānamaya puruṣa.
After this vijñānamaya puruṣa comes the ānandamaya puruṣa. That is supermind consciousness. Gradually, this has been called Universal consciousness. That is, the embodiment of consciousness that pervades the universe. Beyond all of these there is one more consciousness. That is Cit-tapas. It is the consciousness that is the foundation of all consciousnesses. This has been called All effective will. That which has taken on such a form of consciousness is called Super divine life. It has been called consciousness of pure sattva. That is the Sai principle: for the principle that stands at that level, there is nothing at all that it cannot do. This pure principle is endowed with every power. To strive to recognise such a pure principle is the duty of every human being. There are fine ways to recognise it. The human gaze keeps entering only the outer world, always. The divine vision that spreads into that outer world must be turned inward. One must bring forth for oneself the principle of consciousness that is within oneself. And one must become dedicated to the divine consciousness so brought forth. One must take a very firm resolve to achieve this. This is what is called realisation of the inner divine. So, first of all, we must try to develop the inward-turned divinity within us.