“Projection is the dynamic whereby causation is thrown outward: what our mind has caused now seems thrust upon us from without. Projection is motivated by the desire to get rid of our guilt, but its deeper motivation is the desire to make us powerless to change our beliefs. Projection produces a world that seems to have enormous power over us.” - ACIM
“The ultimate purpose of projection is always to get rid of guilt.”
“we made the world in order to transform separation from a crazy idea we made up to an objective reality that made us.” - Robert Perry
The Course explains this purpose behind projection clearly in the following passage: “Though the dream [of this world] itself takes many forms...the dream has but one purpose, taught in many ways. This single lesson does it try to teach again, and still again, and yet once more; that it is cause and not effect. And you are its effect, and cannot be its cause. Thus are you not the dreamer, but the dream.” As a result, the dreamer “cannot doubt his dreams’ reality, because he does not see the part he plays in making them and making them seem real.”
The Ego believes that it can escape through projecting everything out on others…
“We said before that the ego attempts to maintain and increase guilt, but in such a way that you do not recognize what it would do to you. For it is the ego’s fundamental doctrine that what you do to others you have escaped. The ego wishes no one well. Yet its survival depends on your belief that you are exempt from its evil intentions. It coun- sels, therefore, that if you are host to it, it will enable you to direct its anger outward, thus protecting you. And thus it embarks on an endless, unrewarding chain of special relationships, forged out of anger and dedicated to but one insane belief; that the more anger you invest outside your- self, the safer you become.” (T-15.VII.4:1-6)