“The whirling of the mind must be stilled.
The thoughts that arrange the molecules of the mirror of consciousness need the calmness of a still pool—
that we may be able to see clearly.”
Mark L. Prophet, Elizabeth Clare Prophet in Lords of the Seven Rays.
This exercise is useful when you are experiencing mind chatter that is negative—obsessive thoughts, anxiety, depression, etc. It can also be used to train the mind to hold a quieter state. If practiced regularly, the body sensation (relaxing the tongue) will provide a quick anchor to still the mind in time of need.