How does the text contrast the role of the Guru with worldly relationships when pursuing spiritual goals?

In Chapter 45, a clear distinction is made between the steadfastness of the Guru and the unreliability of worldly relationships for spiritual attainment. The text points out that family members, such as parents, sons, or a wife, will ultimately act out of worldly attachment or self-interest and cannot be fully relied upon as companions on the spiritual path. It concludes that upon final reflection, only one's own self remains. The Guru, however, is identified as the true Brahman and the eternal reality, standing in opposition to the transient world. Therefore, the path involves renouncing dependence on fleeting human ties and meditating only on the Guru as the true, constant support.