It is remarkable how similar A Course In Miracles (or at least, this interpretation) is to the Mingyur Rinpoche quote:
The Course's assertion is that everything stems from the mind. The mind's thinking provides the basis for everything that it experiences. Whichever way the mind chooses to look at reality, it will find itself surrounded by and experiencing a "reality" that is the precise mirror of that. The mind's fundamental belief-system first manifests as inner feelings, emotions, interpretations and perceptions; and then manifests as the "outer" reality in which the mind seems to live.
Our healing, then, must be a healing of the mind, a healing of our fundamental perspective on reality. This is what the miracle does. It comes in a moment, a holy instant, when we decide to temporarily suspend our habitual perspective on things. As we momentarily loosen our grip on the ego, our minds are allowed to shift into a new way of seeing things. And since our thinking is the foundation for our entire experience, as our thinking shifts, so does everything else. Our whole experience of life is allowed to brighten from the bottom up, making this kind of healing more deeply liberating than being healed of even the most insidious and destructive physical disease.