How is the 'supreme state' or 'liberation' characterized in the provided texts?

The provided text from Chapter 17 describes the supreme state as the changeless Brahman. This state is achieved when the intellect gives up its function of deciding and the heart attains consciousness. It is a state where the senses, having turned away from worldly objects, become oriented toward the Self, revealing true happiness. A person is considered liberated when they are detached from the objects of both this world and the next, up to the state of Hiranyagarbha. This knowledge of the Self, which leads to supreme bliss, is described as very subtle and deep.