The clarification of course terms states the course was not concern with precise terminology; that all terms are potentially controversial. Anyone who seeks controversy find’s it and those who seek clarification will too, but must overlook controversy. Terms clarified from ACIM and Science of Mind.
The use of the term “Spirit” in Course
The term “Spirit” in the teachings references the Spirit universally accepted as that part of man which enables him to be self-conscious. That which he really is. We do not see the spirit of man any more than we see the Spirit of God. We see what man does; but we do not see the doer. Taken from Science of Mind by Ernest Holmes
Christ, the Son of God Meaning
Christ is creation. The Word of God (his thought made) manifest in and through man. In a liberal sense the Christ means the Entire Manifestation of God. The “Son of God” meaning: All Sons of God and all partake of the Divine Nature. Taken from Science of Mind by Ernest Holmes
The Atonement Meaning
We have always thought of the Atonement of Jesus as the act of His giving Himself, through suffering on the cross, as a sacrifice for the sins of the world. But God surely does not need that any man shall suffer for Him, nor sacrifice himself to please Him. … God does not need an At-one-ment. The act of atonement must be on the part of man and not of God. Man may need salvation, but God is already conscious of Complete Life and Being. Taken from Science of Mind by Ernest Holmes