(Clearwisdom.net) Master said, "With an ill body you cannot develop gong at all." (Zhuan Falun) As I understand it, this means that one cannot develop gong if one's body is not fundamentally purified. On the other hand, if one has a body with gong, illnesses won't be present.
As practitioners, in our personal cultivation we feel the miraculous physical changes in ourselves. We feel the energy. We witness many miracles in other practitioners' lives. During the Fa-rectification period, Dafa disciples use righteous thoughts and supernatural powers to eliminate the evil forces. This all means that we not only have gong in our bodies but we also have mighty powers. In fact, after we attended the Fa-teaching of the nine lectures, we already had gong because Master pushed us beyond low levels to higher ones and had us cultivate on a high level from the very beginning.
From this standpoint, as I understand it, practitioners who obtained the Fa prior to 1999 should not have any illnesses at all. Master had already removed the root factor of illness. Practitioners experiencing "illness karma" should eliminate human notions formed and deeply rooted in the past thousands of years and should not be confused by them during the Fa-rectification era. They should use righteous thoughts to recognize the illusions, look inward, disintegrate and eliminate all dark minions, rotten ghosts, the evil Party's specter, and other factors. Only this way will we be truly doing the three things well.
This is my personal understanding. Please point out anything inappropriate.