How are desire and 'body-consciousness' described as obstacles to liberation in the provided texts?

The source material explains that desires are the root cause of the cycle of rebirth. As Chapter 37 illustrates, just as trees come from seeds, rebirth is obtained through the seeds of desires. This cycle continues with unhindered speed as long as desires persist. The firm belief that "Body is me, this is my wealth" is identified as 'body-consciousness,' which is called the "knot in the heart" and the dwelling place of sorrow. To achieve liberation and become immortal, one must destroy desires at the root, thereby removing this knot and pacifying the bondage it creates.