What is the significance of the 'oneness of the Self' as described in the text, and how does it lead to liberation?

The science of the oneness of the Self is described in Chapter 19 as the very pinnacle of knowledge. This understanding is the true origin of liberation and supreme bliss. When one becomes free from all desires and truly knows that He (the Self) resides in all beings, one attains fearlessness through non-duality. This realization breaks the bonds of action created by ignorance. As a result, the restrictions of worldly rules and prohibitions fall away, allowing the individual to enjoy the profound bliss of liberation, where the distinctions between the Inner Self, God, and the Guru dissolve into one unified reality.