In Mahasandhi, the Great Perfection, any Dharma can lead one to Achievement. Throughout the history, there were many cultivators practicing the Great Perfection, but very few became achievers...
A person who wants to die cannot be saved; a person who refuse to be healthy cannot be saved; those who pursue health can be saved. You should understand there is prospect beyond prospect, and there is growth beyond growth. Guang Huan Mi Zong Dharma, the Great Perfection Dharma, can adapt to all people.
In the ancient time, the "nontransmittable to the third person" Dharmas were transmitted to those royals and the privileged, or on the top of a mountain, or in a deep forest, one-to-one only. Only those who have deep affinity and root capacity and those who are very interested in Dharma learning can climb mountains and cross rivers to look for it, to pursue it...
The practice of Inner Fire is traditionally “not transmitted to a third person” and “not spoken where six ears may hear.” Yet today it is openly transmitted to those attending the Inner Fire Practice Dharma Assembly. Why? To help those who possess the proper root capacity and karmic affinity.
Shakyamuni Buddha spoke of diligence—right diligence. Along the path of effort, you will inevitably encounter obstacles. How can you perfect yourself? You must rely on the precepts. To accomplish anything successfully, you must still rely on the precepts.
Guang Huan Mi Zong has a Dharma that protects the heart and lungs, as well as the Inner Fire Esoteric Dharma, which can block the plague with fire and burn it away.