Ideas leave not their source

There’s a phrase within A Course in Miracles that gets a fair amount of attention, and I believe this attention is warranted because it speaks to an important principle. The phrase is, ideas leave not their source. Here’s the entire sentence where the phrase is found:

Ideas leave not their source, and their effects but seem to be apart from them.

What does this mean? I didn’t author A Course in Miracles so I can only offer my interpretation, but here’s what I think: The phrase is speaking to two things, first our connection with God and, second, our connection to misperception or unreality. Let’s consider our connection to God first. Each of us is an expression of the God presence, we are each an extension of God. I’ve heard this stated as, we are an idea in the mind of God. We seem however to have an existence that is separate from God, we seem to be independent of God. But if we are an idea in the mind of God, and ideas leave not their source, then we’re not separate from God at all a…