Why are worldly relationships seen as unreliable for spiritual progress, and who is the ultimate companion on this journey?

Chapter 45 explains that worldly relationships, whether with in-laws, sons, or even a wife, cannot be fully relied upon for achieving one's spiritual goal. This is because these relations are often motivated by self-interest; for instance, a son may be focused on the wealth he can inherit, and a wife may mourn her own status in widowhood. The text posits that these individuals will not be companions in the spiritual quest. Therefore, upon final reflection, it is concluded that only one’s own self remains as the true companion at the end. A seeker must give up hope in others and maintain strong self-confidence to achieve their spiritual goal.