Realizing the Soul, which is present in the form of consciousness as ultimate truth or Brahman is truth realization.+

The word Brahman or Sat has no proper equivalent in English. The nearest is the ultimate reality or the ultimate truth. The intellectuals however apply reality to individual objects or to the multiplicity of them all, whereas Advaitins apply it to the non-duality. Brahman is called "That" because it is something not known yet by the seeker. 

The word Brahman means ultimate truth or reality which cannot be indicated by any word. The Brahman can be expressed through silence because it is beyond the experience of form, time, and space. Therefore, the word Brahman clearly stands for the essence of the three states, which is the consciousness only. The final thing is to realize the ‘Self’ is not the ‘I’ but the ’Self’ is the Soul, which witnesses the coming and going, of the 'I'.

Realizing the Soul, which is present in the form of consciousness as ultimate truth or Brahman is truth realization. Truth realization itself is Self-realization because the Soul is the ‘Self’. Self-realization itself is God-realization because the Soul is the ultimate truth or Brahman or God.

In Advaita Vedanta: ~ “Brahman is without attributes and strictly impersonal. It can be best described as infinite Being, infinite Consciousness, and infinite Bliss. It is pure knowledge itself, similar to a source of infinite radiance. Since the Advaitins regard Brahman to be the Ultimate Truth, so in comparison to Brahman, every other thing, including the material world, its distinctness, the individuality of the living creatures, and even Ishvara (the Supreme Lord) itself are all untrue. Brahman is the effulgent cause of everything that exists and can possibly exist. Since it is beyond human comprehension, it is without any attributes, for assigning attributes to it would be distorting the true nature of Brahman. Advaitins believe in the existence of both Saguna Brahman and Nirguna Brahman; however, they consider Nirguna Brahman to be the absolute supreme truth.:~Santthosh Kumaar