A brother is an equal sibling of a shared parent.
God is the Father, the shared parent. God created more than one child, more than one son, IN REALITY. Those children are brothers to each other. It takes at least two children to be brothers. The state of being a brother is a permanent reality and relationship, in Heaven, which has always been and always will be. We are permanently brothers. Being a brother has nothing to do with the ego or with separation ideas. The ego is not your father. All references to "brother" in ACIM are talking about the GOD-CREATED EQUAL BEING that is your brother in REALITY. This is A Course in Miracles.
"Heaven is the home of perfect purity. And God created it for YOU. Look at your ***HOLY BROTHER, SINLESS AS YOURSELF*** (having NO ego at all), and let him lead you there."
"I trust my brothers, ***WHO ARE ONE WITH ME***."
"You, ***MY CHILDREN***, are afraid of ***YOUR BROTHERS***, and of ***YOUR (shared) FATHER***, and of YOURSELVES. "
"Perceiving ***THE MAJESTY OF GOD AS YOUR BROTHER*** is to accept your own inheritance. "
"You do not know YOUR creations, because you do not know ***YOUR BROTHERS WHO CREATED THEM WITH YOU***."
"Whenever you heal a brother by recognizing his worth, you are acknowledging ***HIS POWER TO CREATE AND YOURS***. HE cannot have lost what you recognize, and you MUST have the glory you see in HIM. ***HE IS A CO-CREATOR WITH GOD WITH YOU***. Deny his creative power and you are denying yours and that of God Who created you."
"***ALL YOUR BROTHERS*** must enter WITH you, for until you have accepted them, YOU cannot enter. "
"No-one who condemns a brother, can see HIMSELF as guiltless in the peace of God. "
"Brothers can misperceive one another, but they rarely maintain that they do not ***KNOW*** (knowledge is of heaven) each other. This is possible only if they maintain that they are NOT really brothers." (beleiving your brother is not REALLY a brother is not ACIM).
"By guiding your BROTHERS home (home of both of you), you are but following HIM."
"For you will realize that the ONLY value that the body has, is to enable you to bring your brothers TO the bridge WITH you. And to be RELEASED TOGETHER (to go home together as many)"
"Release your brothers from the slavery of THEIR illusions, by forgiving them for the illusions which YOU perceive in them."
"And as they rest, the face of Christ shines on them, and they remember the laws of God, forgetting all the rest, and yearning only to have ***HIS LAWS PERFECTLY FULFILLED IN THEM AND ALL THEIR BROTHERS***. "
"If you would hear me (Jesus, at the level of Heaven), ***HEAR MY BROTHERS*** (who are still his brothers at the level of Heaven), ***IN WHOM GOD'S VOICE SPEAKS***."
"The name of Jesus, is the name of one who was a man but saw the face of Christ ***IN ALL HIS BROTHERS*** and remembered God."
"Your relationship with them IS without guilt, and THIS enables you to look on ***ALL YOUR BROTHERS*** with gratitude, because ***YOUR CREATIONS WERE CREATED IN UNION WITH THEM***." (in heaven!)