ACIM: "Miracle Principle 7
Miracles are everyone's right, but purification is necessary first."
DICITIONARY: "the process of making something spiritually or ceremonially clean."
What is purification? It is the process of removing "impurities", so that you end up with something that is "pure" and has no impurities in it.
What is it we are purifying? Our minds. We are removing "impure thoughts", beliefs, values and attitudes, so that we can be pure. Or rather, aware of our purity in God.
What are examples of impurities? All of the ego stuff, including evil thoughts, attack thoughts, grievances, unforgiveness, blame, anger, murderousness, all forms of sickness and death, separation ideas, body identification, guilt, fear, a sense of sinfulness, unworthiness, etc.
Heaven is a state of perfect purity. Another word for purity is innocence. It's a state completely devoid of any kind of sin or evil. It's so pure, that there isn't even a tiny trace of desire to attack or hurt, there isn't the slightest hint of anger or resentment, and absolutely no sense of fear resulting from seeing others as attackers.
Heaven is SO pure, it is very likely far more pure than you can imagine. And in order to enter awareness of heaven, you have to purify yourself of all states and attitudes that are impure. This actually entails being willing to give up a whole bucketload of ego things, which you may not be currently totally happy about giving up.
You have to give up ALL anger. You have to give up ALL attacking. You have to give up ALL guilt. You have to give up ALL sin. You have to give up ALL temptation to see yourself as victimized. You have to give up ALL desire to hurt other people. You have to give up ALL guilt, shame, and sense of not being good enough. You have to give up ALL motives relating to trying to get stuff. You have to give up all specialness, all selfishness, and all trace of conditional love. You have to give up unhappiness, sickness, suffering and death. And you have to give up the entire ego thought system.
The end result of this relinquishment, is a state of PERFECT PURITY. It is a purity SO pure that it is utterly immaculate, undefiled, and completely holy. The degree of holiness is off the charts in the extreme. You cannot enter such a state with any trace of malice in your heart or any amount of unforgiveness. You have to have forgiven absolutely everyone and everything, and hold nothing against anyone, and see yourself as utterly absolutely sinless.
Only through the complete removal of the belief in sin can you achieve this, because it is the atonement. It is the recognition that there is no sin anywhere, not in you, and not in anyone or anything. It is a state of TOTAL SINLESSNESS. That doesn't mean like, sin is real and evil is real and you have to stop being that through repentance, but more like, the recognition that these things are NOT real and you CANNOT BE them. That sin does not exist for you. There is only total harmlessness, gentleness, softness and love.
The most holy and pure, the most innocent and harmless, the most gentle and clean, the most unwilling to hurt, the most beautiful and new, are those who have purified themselves of the ego, of temptation and of death. It is the purity of the angels. It is absolute allegiance to God. It is a complete and total surrender of all control and egotism and all false ideas of self. It is the complete letting go of all false goals and made-up laws and artificial identities, and any attempt to be other than God created you.
So ACIM is saying that in order to become miraculous, to access the miracle-minded state in which you can PERFORM MIRACLES, which is a very loving state of sinlessness and holiness, you have to FIRST purify yourself. Your mind has to be decluttered and washed out with the spirit and ALL ego in you has to be utterly removed. You have to be cleansed and spiritually renewed. Jesus refers to this in ACIM also as a "rebirth", like becoming new again, as if nothing had ever happened to turn you into an evil monster.
You purify through whatever process works for you. But let's also realize that forgiveness is really the state OF purity, of atonement and of true perception. We are trying to reach that state. Because "only christ forgives" and that means we need total acceptance and alignment and awareness of Christ, TOTAL, MAXIMAL LOVE, in order to be in a state of forgiveness. Anything we do towards that goal is our "practice" or "application" of course principles in which we are trying to move ourselves CLOSER to that state.
This is why ultimately our entire work with the course up to its end goal of resurrection, is really a process of PURIFICATION, which RESULTS IN a state of total forgiveness. In which you have completely forgiven yourself, ie, have recognized that there is absolutely zero ego or sin or death in you. Where your mind is completely open and clear and in the service of spirit. Where Christ can now move through you, and Jesus can perform miracles through your hands.
To purify, you do whatever works, provided it entails the successful progress of moving closer toward total purity. Closer towards God, who is utterly pure, sinless and innocent. You can't be having attitudes of ego, attack, anger, blame, guilt, shaming, destruction etc, if you are to be pure. You can't be a keyboard warrior on facebook. This is the part the ego in you does not like or want, because it means giving up the things the ego CHERISHES and wants. Its way of relating to others through murderous attitudes. It does not WANT purity or holiness, it wants to be evil and wrong and bad, vulnerable and unhappy and destructive.
You can use catharsis, letting go, surrendering, development of trust, opening your mind, trusting God, various modalities of healing, practicing performing miracles, tuning into the love and light in you, prayer, asking for help, receiving love and healing, inviting the Holy Spirit to operate on you (mind/body/emotions), affirmations, cancelling error, reprogramming yourself, convincing yourself, reminding yourself, doing workbook lessons.
You can purify by forgiving people, polishing up your relationships to make them holy and equal and sharing, learning to be more unconditionally loving, working with the angels, giving the day to the Holy Spirit, seeking out blocks to love and removing them, digging out old hurts and unforgivenesses, getting rid of secret sins and hidden hates in the light, handing stuff over to the Holy Spirit, receiving guidance, doing Christ's work etc.
Whatever works. However you purify, however it is you can get yourself into a state of PURITY, of innocence and holiness. A state where you no longer WANT to hurt yourself, or others. A state where you see your TOTAL SINLESSNESS, and therefore project sinlessness onto others and the world, seeing them as sinless, and therefore having no grounds for fear or blame. Purity gives you harmlessness, just as it also puts your mind into a supernatural state of being invulnerable and IMMORTAL.
The innocent are strong and powerful. They are protected by God. They cannot BE hurt and DO not hurt themselves. "You cannot be hurt unless you hurt yourself." "My attack thoughts are attacking my invulnerability" etc. They feel safe and secure and protected and guided. They cannot be attacked and are above the battleground. Nothing can intrude upon them because of the strength of spirit. And they can bestow healing and miracles and life upon those who are not yet purified - those who believe they are the living dead.
Once purification is reached, in part or in whole, you will have access to miraculous power. You will have the innocence with which to love, and the light with which to see. You will have the purity of heart and the total angelic harmlessness and gentleness with which to heal others. "Those who are healed become instruments of healing." You will become a miracle worker, able to raise the dead and resurrect the impure.
You will be able to actually purify others for them. "It is the privilege of the forgiven (pure) to forgive (purify)." And now you are doing God's work, until you go home to heaven, to the state of total and utter purity and innocence forever.