We have many names for death. Headaches, cancer, diabetes, wounds, heartache, unhappiness, grief, lack, depression, insanity, all of it is really death. According to ACIM anything even slightly less than total immortality - eternal life - is a form of death.
"Death is a thought which takes on many forms, often unrecognized. It may appear as sadness, fear, anxiety or doubt; as anger, faithlessness and lack of trust; concern for bodies, envy, and all forms in which the wish to be as you are not may come to tempt you. All such thoughts are but reflections of the worshipping of death as savior and as giver of release."
We have categorized all these sicknesses as if to say there is an entire hierarchy of illusions, some more severe or more dangerous or more total. But they are all one thing, really. Fear of cancer is really fear of death. A cold is a small death. Being sad is death. Anything which moves us away from eternal life is attempted suicide. Any slight lack of absolute joy and worthiness is a sense of having died.
So it's not like, you've just got an issue with a certain kind of sickness, or an inherited specific problem, or a propensity to contract certain issues in certain situations. It's all really one thing. One illusion, all of it is death, and it has only one solution.
"Without the idea of death there is no world."
"Death is the central dream from which all illusions stem. Is it not madness to think of life as being born, aging, losing vitality, and dying in the end?"
Each time we are unhappy we're moving into death. Each time we're afraid of sicknesss we're moving closer to death. Each time we hold a grievance we want some death. Each time there's a slight twinge of annoyance we're going into death mode.
When we are as God created us, willing to be only that, we are immortal. "You are immortal and you cannot die." And that immortality is accompanied by God's will, joy, love, eternal life, peace, happiness, constant perfection, holiness, creation, etc. These are our natural birthright, given by God. When we move in any way against these things or reject or deny them we are attempting death.
"All forms of sickness, even unto death, are physical expressions of the fear of awakening. They are attempts to reinforce UNCONSCIOUSNESS out of fear of CONSCIOUSNESS. This is a pathetic way of TRYING NOT TO KNOW by rendering the faculties for knowing ineffectual. "Rest in peace" is a blessing for the living, not the dead, because rest comes from waking, not from sleeping. Sleep is withdrawing; waking is JOINING."
Each time we move into unconsciousness in some way, into some kind of life-denying rejection of love and joining, a breakdown in our holy relationship, we are trying to bring about death by making ourselves UNAWARE of the truth. This unawareness, attempted unconsciousness, is attempted death and attempted murder. It's not in our best interests, although ultimately it's just a dream and not a reality. But dreams can be nightmares to those who don't want life.
A Course in Miracles is a course in life. A return to immortality. Resurrection from a state of death. We are literally coming back to life, coming home to eternity, and returning to immortality in God.
"Sickness is but a "little" death; a form of vengeance not yet total. Yet it speaks with certainty for what it represents. The bleak and bitter picture you have sent your brother, YOU have looked upon in grief. And everything that it has shown to him have you believed, BECAUSE it witnessed to the guilt in him, which you perceived and loved. Now in the hands made gentle by His touch, the Holy Spirit lays a picture of a DIFFERENT you. It is a picture of a body still, for what you REALLY are can not be seen nor pictured. But THIS one has NOT been used for purpose of attack, and therefore never suffered pain at all. IT witnesses to the eternal truth that you can not BE hurt, and points BEYOND itself to both YOUR innocence and HIS."
"You are immortal and you cannot die. But you can confuse yourself with things that do."