Quote from ACIM Text Chapter 1, Section 3 - Revelation, Time and Miracles.

"No man cometh unto the Father but by me" does not mean that I am in any way separate or different from you except in time, and time does not really exist. The statement is more meaningful in terms of a vertical rather than a horizontal axis. You stand below me and I stand below God. In the process of "rising up," I am higher because without me the distance between God and man would be too great for you to encompass. I bridge the distance as an elder brother to you on the one hand, and as a Son of God on the other. My devotion to my brothers has placed me in charge of the Sonship, which I render complete because I share it. This may appear to contradict the statement "I and my Father are one," but there are two parts to the statement in recognition that the Father is greater.