Based on these teachings about oneness, what should my personal spiritual goal be and how can I achieve it?

Your ultimate goal should be to realize the state of oneness, where you no longer see anything as separate from yourself. As Chapter 14 teaches, the idea that "I am different, and people are different" is a product of ignorance. To achieve this, you must surrender to the single Essence that exists within you and throughout the entire universe. The path involves following the Guru's teachings to purify the mind, abandoning the errors of ignorance and delusion, and learning to see the divine in everything, recognizing there is no place empty of this presence.