“Sadhaka raises his tongue and enters the nasal cavity, behind the epiglottis, and reaches behind the nasal cavity and penetrates the sinus cavity and finally reaches to the Brahmarandhra – the fountain of nectar of immortality. Through this, progress on the path for the sadhaka is made considerably easier and clearer.” It is by this that an earthly knot, meaning a significant knotting of the ties of material bondage - is undone and released. It is this fluid that is described in the scriptures as 'Sahasrarchyut Sudha' - that nectar which yogis drink as they move forward on the path of Immortality. In a particular state experienced during the practice of this technique, a certain type of fluid comes upon the tongue that improves the health of body and mind. This Khechari Mudra is what can be called as 'breaking through the tongue-knot.' Gradually, there is advancement of this condition. It is said in the scriptures that when the tongue arrives at the end of its full journey, the state of 'jada-samadhi' comes about. Along with the practice of Kriya Yoga and the advancement of mental absorption, the tongue continues to go up even further.

In this manner, the tongue arrives at the junction point of the nasal passage inside the hole in the palate. This act in many ways helps the disciplined life. With the help of some physical and a certain amount of mental effort, the tongue can be inserted into the hole in the upper palate.

Just as asana and such are needed in the field of sadhana, in the same way, there is a special necessity for breaking through the tongue-knot, or Khechari Mudra.

Lahiri mahasaya diary