1-1 Shivashaktya'tmakam' Brahma.
Brahma is the composite of Shiva and Shakti.
Purport: Brahma [Cosmic Entity] is the composite of Shiva [Consciousness] and Shakti [Operative Principle].
A piece of paper has two sides. Although they are two for the sake of argument, they cannot be separated from the one paper entity. Removal of one side of the paper jeopardizes the existence of the other. So is the relation of Purus'a [Consciousness] and Prakrti [Operative Principle] in the Cosmic Entity. None of them can stand without the other. That is why it is said that they are an inalienable concomitance.
Although as a philosophical word, shiva or purus'a is extensively used, in common parlance the word a'tma' [“soul” or “self”] is more extensively used in the same sense. Shiva means “witnessing consciousness”. So does purus'a – Pure shete yah sah purus'ah, that is, “The witness-ship that lies quiescent in every entity is the purus'a.” And a'tman means “that which is omni-telepathic”.
The physical sense of the body is telepathized on the mental plate. In other words, the physical sense is awakened in the mental plate due to the reflection that follows the impact of the crude physical waves on the mental plate. Similarly, the sense of every crude object is awakened in the mental plate as soon as the reflection takes place following the impact of the waves of the 0bjects on the mental plate. Identical mental waves hit the soul entity, causing the reflection of those mental waves, and this awakens in the unit a sense of its indivisibility from the soul. If, in the language of philosophy, mental waves, that is, thought, be called thought-waves, then the reflection of the mental waves on the soul-plate will have to be termed telepathic waves. And so in reference to the soul-plate, we may say that it is telepathic to the mind. All mundane objects, crude, subtle or causal, consist in mental waves or thought-waves, and so in the fullest accord with reasoning and logic, we may call the Soul omni-telepathic. It is because of this omni-telepathic A'tman that the existences of all mundane objects, visible or invisible, large or small, find their factual substantiation and recognition. Had there been no A'tman, the existence of everything would have been in jeopardy.