Here is a very good description of what miracle working (for others) is about and WHY your brother needs YOU to perform a miracle FOR them.
"Miracles are merely the translation of denial into truth. If to love oneself is to HEAL oneself, those who are sick do NOT love themselves. Therefore, they are asking for the love that would heal them, but which they are DENYING TO THEMSELVES. If they knew the truth about themselves, they could not be sick. The task of the miracle-worker thus becomes to DENY THE DENIAL OF TRUTH. The sick must heal THEMSELVES, for the truth is IN them. But, having OBSCURED it, the light in ANOTHER mind must shine into theirs, because that light IS theirs."
Notice that the miracle worker‘s "task" is to heal those who have sick minds (and consequentially a sick body).
Notice also that because your brother is in denial, they have obscured their OWN willingness to heal and now NEED YOUR HELP.
Notice finally that the light in ANOTHER MIND (E.g. you as a miracle worker) must SHINE INTO THEIRS, in order to HEAL the sickness in the mind of the brother.
Since all miracles are EXPRESSIONS of love, and miracle DOING expresses FROM miracle mindedness (right mindedness), love must actively be given/radiated/extended/sent to do this. The light in your mind has to shine into another mind. This heals their mind. FOR them.
This is how you release your brother. This is how you be "a physician of the lord".
"Miracles supply a lack"
"Miracles are given BY THOSE who temporarily have more, TO THOSE who temporarily have less."
"Miracles are a spark of life"
"Miracles RAISE the level of communication."
"Miracles mean LIFE, and God is the giver of life." Through miracles, you GIVE LIFE to those who are lacking it (which is sickness), RESURRECTING THEM. Miracles heal the sick and raise the dead.
"Perceive in sickness but another call for love, and offer your brother what he believes he cannot offer himself. Whatever the sickness, there is but one remedy. You will be made whole as you MAKE whole, for to perceive in sickness the appeal for health, is to recognize in hatred the call for love. And to give a brother what he REALLY wants, is to offer it unto yourself."