"The sign of Christmas is a star, a light in darkness. ²See it not outside yourself, but shining in the Heaven within, and accept it as the sign the time of Christ has come." (https://acim.org/acim/en/s/200#2:1-2 | T-15.XI.2:1-2)

"The world we see merely reflects our own internal frame of reference—the dominant ideas, wishes and emotions in our minds. “Projection makes perception” (T-21.in.1:1). We look inside first, decide the kind of world we want to see and then project that world outside, making it the truth _as we see it_. We make it true by our interpretations of what it is we are seeing. If we are using perception to justify our own mistakes—our anger, our impulses to attack, our lack of love in whatever form it may take—we will see a world of evil, destruction, malice, envy and despair. All this we must learn to forgive, not because we are being “good” and “charitable,” but because what we are seeing is not true. We have distorted the world by our twisted defenses, and are therefore seeing what is not there. As we learn to recognize our perceptual errors, we also learn to look past them or “forgive.” At the same time we are forgiving ourselves, looking past our distorted self-concepts to the Self That God created in us and as us." (https://acim.org/acim/en/s/43#6:1-9 | Preface.6:1-9)

"This is the shift that true perception brings: What was projected out is seen within, and there forgiveness lets it disappear. ²For there the altar to the Son is set, and there his Father is remembered. ³Here are all illusions brought to truth and laid upon the altar. ⁴What is seen outside must lie beyond forgiveness, for it seems to be forever sinful. ⁵Where is hope while sin is seen as outside? ⁶What remedy can guilt expect? ⁷But seen within your mind, guilt and forgiveness for an instant lie together, side by side, upon one altar. ⁸There at last are sickness and its single remedy joined in one healing brightness. ⁹God has come to claim His Own. ¹⁰Forgiveness is complete." (https://acim.org/acim/en/s/855#6:1-10 | C-4.6:1-10)

"And turn you to the stately calm within, where in holy stillness dwells the living God you never left, and Who never left you." (https://acim.org/acim/en/s/219#8:2 | T-18.I.8:2)