The First in Eternity is God the Father

"The first in time means nothing, but the First in eternity is God the Father, Who is both First and One.  Beyond the First there is no other, for there is no order, no second or third, and nothing but the First."
"You who belong to the First Cause, created by him like unto himself and part of him, are more than merely guiltless.  The state of guiltlessness is only the condition in which what is not there has been removed from the disordered mind that thought it was.  This state, and only this, must you attain, with God beside you.  For until you do, you will still think that you are separate from him."
"When you have let all that obscured the truth in your most holy mind be undone for you, and therefore stand in grace before your Father, he will give himself to you as he has always done.  Giving himself is all he knows, and so it is all knowledge.  For what he knows not cannot be, and therefore cannot be given.  Ask not to be forgiven, for this has already been accomplished.  Ask, rather, to learn how to forgive, and to restore what always was to your unforgiving mind.  Atonement becomes real and visible to those who use it.  On earth this is your only function, and you must learn that it is all you want to learn."
"You need not understand creation to do what must be done before that knowledge would be meaningful to you.  God breaks no barriers; neither did he make them.  When you release them they are gone.  God will not fail, nor ever has in anything.  Decide that God is right and you are wrong about yourself.  He created you out of himself, but still within him.  He knows what you are.  Remember that there is no second to him. There cannot, therefore, be anyone without his holiness, nor anyone unworthy of his perfect love.  Fail not in your function of loving in a loveless place made out of darkness and deceit, for thus are darkness and deceit undone.  Fail not yourself, but instead offer to God and you his blameless Son.  For this small gift of appreciation for his love, God will himself exchange your gift for his."
"Before you make any decisions for yourself, remember that you have decided against your function in Heaven, and then consider carefully whether you want to make decisions here.  Your function here is only to decide against deciding what you want, in recognition that you do not know.  How, then, can you decide what you should do?  Leave all decisions to the One Who speaks for God, and for your function as he knows it.  So will he teach you to remove the awful burden you have laid upon yourself by loving not the Son of God, and trying to teach him guilt instead of love.  Give up this frantic and insane attempt that cheats you of the joy of living with your God and Father, and of waking gladly to his love and holiness that join together as the truth in you, making you one with him."
"Unless you are guiltless you cannot know God, Whose Will is that you know him.  Therefore, you *must* be guiltless.  Yet if you do not accept the necessary conditions for knowing him, you have denied him and do not recognize him, though he is all around you.  He cannot be known without his Son, whose guiltlessness is the condition for knowing him. Accepting his Son as guilty is denial of the Father so complete, that knowledge is swept away from recognition in the very mind where God himself has placed it.  If you would but listen, and learn how impossible this is! Do not endow him with attributes you understand.  You made him not, and anything you understand is not of him."
"Your task is not to make reality.  It is here without your making, but not without you. You who have tried to throw yourself away and valued God so little, hear me speak for him and for yourself.  You cannot understand how much your Father loves you, for there is no parallel in your experience of the world to help you understand it.  There is nothing on earth with which it can compare, and nothing you have ever felt apart from him resembles it ever so faintly.  Would you know of One Who gives forever, and Who knows of nothing except giving?"
- A Course in Miracles, Chapter 14, Section 4 (5pdf)
"Teaching for Truth," "Your Function in the Atonement"
https://tinyurl.com/A-Course-In-Miracles-pdf