There are, I believe, at least two instances where A Course in Miracles alludes to the cultural reforms of the Pharaoh Ikhnaton. First, the Course contrasts the “darkened temples where mysteries are kept obscure and hidden from the sun” (T.20.VI.4.1), with the “living temple in a world of light” where flowers “sparkl[e] in the summer sun” (T.26.IX.3.1–2.) By the time of Ikhnaton, the temples of Amun had many dark corners, secrets and hidden things. But the temples Ikhnaton commissioned were open-air, laid out according to the east-west axis of the sun’s daily progress through the sky, and communion with the divine was done outdoors. Second, there is no greater description of the Aten, a symbol of our collective memory of our oneness with our source, in literature than the famous “arc of golden light” passage of the section of the Course entitled “The Forgotten Song,” which you may find at T.21.I.8–9:
Beyond the body, beyond the sun and stars, past everything you see and yet somehow familiar, is an arc of golden light that stretches as you look into a great and shining circle. And all the circle fills with light before your eyes. The edges of the circle disappear, and what is in it is no longer contained at all. The light expands and covers everything, extending to infinity forever shining and with no break or limit anywhere. Within it everything is joined in perfect continuity. Nor is it possible to imagine that anything could be outside, for there is nowhere that this light is not.
This is the vision of the Son of God, whom you know well. Here is the sight of him who knows his Father. Here is the memory of what you are; a part of this, with all of it within, and joined to all as surely as all is joined in you. Accept the vision that can show you this, and not the body. You know the ancient song, and know it well. Nothing will ever be as dear to you as is this ancient hymn of love the Son of God sings to his Father still.