Found it! And I chuckled at the subtitle almost exactly mirroring my question about the 4th dimension. Thanks! Looking forward to reading it.

Boy have I been doing some fourth dimensional processing lately! It makes so much sense that it will take TIME to release the old, 3D view of reality and replace it with a 5D one, and that 4D gives us the space-time in which to do it.

I found a great description of what constitutes these different dimensions that reflects what the AAs are saying. https://lightomega.org/writing/fifth-dimensional-consciousness-of-unity-including-time-and-the-timeless/