Moondance grins. He seems to enjoy the questions. "That is a simplification of how Healing works, though close enough in practice. One could argue that the most important part of a Healer's Gift is the Sight – the ability to directly perceive natural processes in the body, both at a high level and in closer detail. Once a Healer knows to interpret this Sight, they can nudge these processes – either speed or slow, or even nudge into motion something that the body was not already doing, but for which it has the capacity."
He stops for a while, lips moving silently in thought.
"The land, of course," he says finally, "is not a person. An ordinary Healer would look and see nothing with their Sight. A mage can See energy-flows – when you are more trained, I might take you outside the Vale, and show you the difference between the tamed magic inside the Vale and the residue outside. However, an ordinary mage, even a very powerful one, does not possess all of the Sight I need to do my work. Nor does a Healer. There is...something more, that means I am a Healing-Adept. I do See the life within the land in a way not so dissimilar to how I See the life in your body."
A brief shiver. "And, just as a Healer not trained to shield will feel ill when their patients do, I am very sensitive to 'illness' in the land. I can shield, but I must be open in order to make full use of my Gifts. This is one reason why my work is so difficult, and why you may sometimes find me tired and snappish when I return to the Vale. In any case, one might say that my Sight is the most important part. Once I can know what is wrong, both the larger picture and the fine details, there are techniques I can learn to repair the damage. Those techniques are among the lore that the Star-Eyed granted our people in the early days. It is difficult to describe them more without your sharing my Sight, but," he hesitates, "if at some point you are curious, perhaps you might accompany me one day, and watch my mind as I work?"