The Worry-free Heart Sutra has eighteen heart methods, the first six of which belong to the early stage of Qi refining. These six heart methods of the early stage of Qi refining are also different from one another.
The first layer of the heart method is the most crucial, marking the transformation from an ordinary person to a Qi refiner - a fundamental change. This threshold bars the vast majority of people; without refining even the slightest trace of True Qi, they can never truly become Qi refiners. The cultivation of inner strength in the martial path is the same; without the ability to produce the sensation of Qi, one can't find the way to develop their inner strength. However, this threshold is lower than that of the Immortal Dao Qi Refiner's.
