Can you explain the concept of the 'supreme state' or 'changeless Brahman' and what is required to be consecrated in it?

The 'supreme state,' or 'changeless Brahman,' is described in Chapter 17 as the ultimate goal of spiritual practice. This state is achieved when the interior is turned back upon itself, the intellect gives up its function of deciding, and the heart attains consciousness. It is a state of supreme bliss beyond worldly dualities. To be consecrated in this state of Brahman, one must be completely detached from the objects of this world and the next, even up to the state of Hiranyagarbha. The text states that such a person, who has successfully turned away from all worldly objects, should be known as liberated.