Aham, a concept of Kashmir Shaivism, is defined as the supreme heart , transcendentSelf, supreme I awareness or infinite consciousness. The space of Aham is where khecarī mudrā is realised. Khecarī mudrā is considered the supreme state of spiritual evolution.
Substrate of creation
When Śiva wants to create, the first step is said to be the creation of an interior space - a matrix of energies that will be the substrate of the new world. This place is called Aham which means "I" in Sanskrit. Thus the absolute first creates the divine person, Aham, and from this divine person will appear the manifestation itself. Aham is identical to , essential nature of all categories from The 36 tattvas#p.E1.B9.9Bithv.C4.AB - earth| to The 36 tattvas#sad.C4.81.C5.9Biva|,. Aham is the final resting place, dwelling place, abode of all beings, receptacle of the world.
Ultimate mantra
Another definition of Aham is that of primordial mantra, transcendental mantra, the so-called heart-bīja - force and power of consciousness. As the supreme mantra, Aham is closely related to matravīrya. Thus the realization of Aham confers power over any mantra.
In Aham, the supreme aspect of Śakti is realized. Aham is the Śakti of Śiva or in other words, the expansion of Śiva. Another way of describing Aham is as the union of Śiva and Śakti, the emittive aspect of the Supreme.
Etymology
Aham is formed of A+HA+M, a triad of Śhiva, Śakti and bindu. M is the final point, union of Śiva and Śakti, where they dissolve into Paramaśiva. The triangle of A+HA+M is the essence of the Trika system. A+HA+M form the , a mantra that is identical to the energy of expansion and creation. Aham can also be defined as: A = abedha, HA = bheda and M = bhedābheda.
On the other hand, Maha, mirror image of Aham, is formed of Ma+Ha+A, and represents the - the mantra that is identical to the process of spiritual evolution, or in other words reabsorption of the manifestation back into the absolute. In Maha, Śakti enters bindu and reunites it with the Supreme.
