How to read this library
Glossary
Hard words, in plain English. The Course redefines almost every religious word it uses. Ra uses another dialect for the same work. Look a word up, then go live it.
In plain words

In plain words
You do not need a monastery. A quiet room and today’s sentence are enough.
The day is the temple. One idea. A chair. Light already in the room.
How the workbook asks you to practice
One lesson a day
Do not take on more than one set of exercises in a day. The training period is a year. The idea is not to finish the book. It is to let one idea work.
You need not believe it
You are not asked to believe, accept, or even welcome the idea. Resistance does not cancel it. Use it anyway. Nothing more than that is required.
No exceptions
Do not decide that some people, objects, or situations are exempt. The training is generalization. If you make exceptions, you keep the ego's hierarchy.
Time and place
The exercises are simple. They do not need a shrine. Early lessons are often a minute. Later ones ask for quiet morning and evening time, then hourly remembrance. Follow the day's lesson, not a generic routine.
Each lesson then gives its own duration and frequency. Open the day’s lesson — the Practice card follows that lesson, not a generic routine.
Start here
If you only learn these, you can walk the rest of the library.
Infinite Creator
Also called: intelligent infinity, Source, God
Not a person in the sky and not a judge. Infinite possibility, intelligent, wholly benevolent. You have never left It. The Course’s God and Ra’s Infinite Creator are the same report in two dialects.
See the four-stream entryOriginal Thought
Also called: the Law of One, the One Infinite Creator thinking
Ra’s first sentence: all things are one original Thought. Not a slogan. The universe is that Thought, seeming many. You have not left it. The Course’s “God is” and “Love created me like itself” are the same report.
See the four-stream entryThe veil
Also called: the forgetting
Ra’s word for third-density forgetting — why you do not remember what you are. The Course’s “tiny mad idea taken seriously” is the same cut. You do not rip the veil. You work through it. That is why you are here.
See the four-stream entryDensity
Also called: third density, octave, dimension (loosely)
Ra’s map of how consciousness is organized as grades of light — not a caste, and not a sci-fi “dimension” you teleport into. First is being, second growth, third the Choice (you are here), fourth love, fifth wisdom, sixth unity, seventh the gateway, then the octave turns. You do not need the map to do Lesson 34. The library uses it because the same training is being described in another dialect. Full primer: Octave.
See the four-stream entryHarvest
Also called: graduation, polarization, what people call ascension
Ra’s word for a mind becoming consistently loving (or consistently controlling) enough to graduate this density. Positive path: roughly 51% service-to-others. Negative: roughly 95% service-to-self. Mixed minds repeat third density. The Course’s salvation/Atonement is the same movement without the cosmology. It is not a date. It is whether this next choice loves.
See the four-stream entryService-to-others / service-to-self
Also called: service-to-others, service-to-self, polarity, the fork
Ra’s names for the two directions a mind can choose: toward the other as the Creator, or toward control. Third density’s only exam. Service-to-others is not martyrdom and not people-pleasing — a working majority of love (roughly 51%). Service-to-self is steep (roughly 95% control) and allowed by free will; the Course simply calls it the ego and does not recommend it. Mixed is a retake.
See the four-stream entryForgiveness
Also called: true forgiveness, pardon as the Course means it
Not: “You did it, and I am noble enough to let it go.” Course forgiveness looks at the scene, sees that nothing real was threatened, and drops the claim that this person (or this body, or God) created a different kind of being. You remember the event. You refuse to let it author the future. That is not denial.
See the four-stream entryMiracle
In this course a miracle is a shift in how you see — from attack to joining — not a supernatural stunt. There is no order of difficulty: the small irritation and the lifelong grievance use the same mechanism. A miracle collapses time because you stopped insisting on the old story.
A correction of perception, natural as love.
See the four-stream entryAtonement
Also called: the correction, the plan
Not payment to an angry God. Atonement is the already-finished correction of the idea that separation worked. You do not invent it. You accept it — usually by forgiving in a real situation (Lesson 139). Salvation is that acceptance, lived today. Full study: Atonement.
The Holy Spirit’s plan. Miracles are its means.
See the four-stream entryHoly Spirit
Also called: Voice for God, God’s Voice, the Guide
The remaining communication link — the part of your mind that never believed the separation. Not a ghost in the room. The inner Teacher who translates the world you made into a classroom. When a lesson says “listen,” this is Who is being listened for. Stillness is the method; manufactured voices are the ego auditioning.
See the four-stream entryEgo
Also called: the separated self
A belief, not a little person inside you. The ego is the thought that you are a private self who must win, defend, and explain. You cannot fight it. You stop using it as your advisor. Spiritual specialness is still the ego, in better clothes.
The belief that you could be other than as God created you.
See the four-stream entryCatalyst
Also called: the event, the charge
A Law of One word this library uses for what the Course calls a grievance, upset, or lesson: the thing that happened, which is neutral until the mind uses it. Used, it becomes love. Stored, it becomes a story and a block. The named “cause” of upset is almost never the actual one.
See the four-stream entryEnergy center / ray
Also called: chakra, red through violet
Ra’s inner spectrum of the mind/body/spirit complex — seven rays, from survival (red) to the readout of the whole being (violet). Blocked, they store catalyst as a story. Balanced, they move love/light. Green (the heart) is the springboard to fourth density. This library’s Centers page is the working map.
See the four-stream entryCrosswalk
Course terms beside Spalding, Ra, and Carla — and a practice small enough to do before the day gets opinions.
The One / The Law of One
Today, when you see an enemy, say: this too is the One, disguised as my homework.
Forgiveness / using catalyst
Name the grievance. Ask what it gives you. Offer that gift back. Watch the charge drop one degree.
Miracle / instant polarity
Do not wait for a worthy occasion. The small irritation is eligible.
Holy Spirit / Higher Self / Logos within
Ask one question. Wait. Do not manufacture a voice. Take the next kind action as the answer if silence holds.
The veil / the forgetting
When you 'know' why someone did a thing, admit you are reading your overlay. Ask to see through.
The Choice / God or the ego
Label three choices today: toward love, toward control. No shame. Just labels.
Love / the original thought
Give the thing you are trying to get. Then see if love was ever missing.
Light / Love/Light
Enter a room as light, not as a need. Notice the difference in your shoulders.
Ego / service-to-self distortion
When a spiritual thought makes you special, that is the ego, wearing the Course.
The body / group-center (yellow) vehicle
While washing, say: tool, not self. Keep washing with kindness.
The holy instant / present nexus
Give this instant. Then this one. Lesson 365 is the whole method.
Holy relationship / heart (green) bond
In the next friction, ask: am I using them, or joining them?
The world / third density
Loosen one meaning you glued onto a place you live. See what remains.
Atonement / the correction
Say Lesson 139 to one real grievance: I will accept Atonement for myself. Then give the peace you accepted, without a speech.
Harvest / salvation
Stop asking when. Ask whether this choice would harvest.
Wanderer / elder brother
If you feel 'not from here,' live the ordinary hour anyway. That is the mission, unromantic and correct.
Jesus / the one known as Jesus
Speak to him as present. Then do the kind thing you already know. That is the whole devotion.
Fear / unused catalyst
When fear names a future, come back to the room. Forgive the room. That is the work.
Will / free will / little willingness
Offer the little willingness without upgrading it into a vow you will then break.
Peace / balanced centers
At friction, say lesson 34. Wait for the body to drop half an inch.
Vision / seeing the Creator
One person today. Look as if they were the one you came here to remember.
Time / space-time and time-space
When the past speaks, say: over. Then deal with the present kindness that is actually asked.
Death / release of the vehicle
Treat the body as a loan. Care for the loan. Do not confuse the loan with the borrower.
Prayer / seeking / tuning
Two minutes. No list. 'Here.' That is a complete prayer.
Function / service-to-others
One hidden service today. If you need it known, it was not this.
Christ / social memory of love
See Christ in one unlikely face. Do not announce it.
Sin / error / distortion
Rename one 'sin' as 'error.' Then correct the next action. Skip the identity funeral.
Specialness / the elite trap
If a teaching makes you more separate from the person doing ordinary work beside you, drop it for the day.
Healing / realization of no disharmony
Join with the one who suffers without taking their story as final. That joining is the medicine you actually have.
Infinite Creator / God
When you pray as a peasant to a king, stop. Ask as what you are. Then do the next kind thing.
Logos / sub-Logos
Look at the sun, the ground, or your own hands as a nested mind, not as furniture. Courtesy is the practice.
Energy centers / rays
Pick today’s catalyst. Feel it. Hold the opposite. See them as one. Let one center glow. Then live the day.
Official workbook introduction: acim.org.