When there are ego beliefs which say, there is some truth to something opposite to God's truth, you will not be willing, ready, or able, to accept atonement.
You'll want to accept it but there will be something in you which objects or nags or gives you a sense of suspiciousness, that something just isn't quite acceptable or true about God's truth. No matter how plainly clear God's truth is, how clearly presented, or how obvious, the ego STILL distorts perception and can't quite see it squarely, suspecting there is some kind of deception going on, which is its own.
This is why the ego ranges from suspicious to vicious. At best, it does not quite agree with God, and so has this in-built fear and doubt that makes it "not believe" what the truth is saying. This is because it believes something else and has loyalty to something else.
What needs to happen in your mind is that you undo ALL beliefs which are false or saying something out of accord with God's truth/will. Until you do that, you will not be willing to accept the truth.
So if you have a belief that you are afraid and fear is real or fear causes something or you can't stop the fear, there is no way you are going to be willing to accept God's truth. You won't be able to see that it makes perfect sense, or that there is no other reason NOT to accept it.
So then you have to look at the fear and recognize why its an illusion, recognize it as false, unfounded, non-causal, and the fact that it is actually an EFFECT of something deeper. Fear covers up guilt and makes guilt go unconscious, and is being caused BY guilt.
So you have to then dig out the guilt and make it conscious and then do the same thing. You have to come to recognize and accept that the guilt is not true, it's a lie, you're not really guilty, the guilt isn't causing anything, it's just an effect of a belief in sin. Guilt is denial of sin.
Same thing applies to sin, it has to be uprooted and examined, and its at this point that you are bringing into question whether something even happened at all. If the sin occurred "in reality" and thus this world is reality, then you can't let it go. But if you can recognize there is no sin because whatever seemed to happen was an illusion in a fictional world, you can recognize the sin did not happen in REALITY, only in a dream, and thus is not a "real sin". This allows you to let go of the belief that you are sinful.
Once you've got your mind and BELIEF to the place where you recognize that "it makes sense" to you, that you have not sinned in reality or against God, and therefore no REAL effects can have happened, it simply LOGICALLY justifies to you that you MUST therefore STILL BE INNOCENT.
You have to get to that point logically and in terms of it making sense to you, for you to believe that this is correct, accurate, and truthful. THEN, it is absolutely effortless for you to see that God's truth makes sense. That means, you will now be not only ABLE to accept it, but also WILLING to, simply because you don't see ANY other reason not to, and your reasoning (truth) has set you free of all the contrary opposing beliefs. You basically run out of excuses or beliefs as to "why you shouldn't".
This makes you able to accept, fully, and embrace, the atonement. The atonement means nothing happened, you are still as God created you, God still loves you, you did not DO anything at all in reality, there hasn't even been a real sin, you MUST still be innocent, and therefore you MUST BE WORTHY of God's love. This makes it possible for you to ACCEPT that God loves you and RECEIVE HIS LOVE. Acceptance is receiving. What you accept you will receive into your mind and it will be REALITY to you.
Your accepting of this truth without any objections or counter-arguments, allows you to RECEIVE LOVE, and therefore this is what it means to RECEIVE A MIRACLE. This reception also means, since you are willing to recognize that you are WORTHY of being loved, that you also recognize that EVERYONE is ALSO worthy of being loved.
So your willingness to receive atonement/truth/love entails the automatic extension of that worthiness to everyone. And this is also why your receipt of the atonement, the receiving of miracles, puts you in the position of BEING PART OF THE ATONEMENT ITSELF, and therefore you now have received miracles and CAN GIVE MIRACLES TO OTHERS. "You can only give the miracles you have received". To really RECEIVE a miracle requires acceptance and willingness to receive God's truth, even for a moment.
You then are an expresser of the atonement, of God's will and God's love, to others, to help others to also get to the atonement through miracles and correction and teaching. And this is your FUNCTION at that point. It is everyone's function to become part of Jesus's atonement plan and to then be an ACTIVE WORKER in the world helping to demonstrate the truth is true through miracle working. There is much "work to do" at that point, in the "Great Awakening" or "Great Crusade" as Jesus calls it.
So this can only happen for you when you are willing, ready, and able to accept the truth, to see that it makes sense to you and therefore to logically have no other reason NOT to. This is why all other opposing ego beliefs have to be let go first.
As a special final note, I want to make it clear that you do not have to undo ALL of the ego in order to accept "some" atonement, or to receive a miracle. "One moment of love without fear is all that is necessary that all this occur" even if fear returns afterwards (paraphrasing).
You can for example, if you are working on a specific issue, e.g. maybe you are forgiving a parent or an abuser or something, you can undo all beliefs surrounding it and go ALL the way to the atonement principle with it, accepting God's love. You WILL be able to experience SOME measure of love and worthiness, and will therefore be able to receive SOME healing. And this WILL give you a miracle, and you WILL become able to give this miracle to others at that point, even if you still have OTHER seemingly separate issues to undo. There are obviously some limits to this but the first time I did this Jesus told me, "you can perform miracles now."
The final atonement happens when you have basically atoned on ALL issues and have no ego left whatsoever.
Atonement is also the same thing as forgiveness, so when you are "applying forgiveness", you really SHOULD be taking it ALL the way to the atonement and accepting and receiving God's love at the end, otherwise you are not doing a COMPLETE forgiveness.