>>512673317
See the Ankh hanging from it in that picrel? In Egypt the sun was said to pass through the underworld and resurrect each day, and to the Egyptians (master alchemists) they attributed this to the alchemical process of "death and resurrection". In this hieroglyphic you can see the 2 people grabbing on to the ladder on either side, you can't really tell but right is a man and left is a woman. Their apparel make that clear. Right represents Osiris and left represents Isis. Its another version of the tree of life. Sol Invictus, like Aten, are the time when the many different aspects of the one true God were abandoned in worship, favoring only the sun as a macrocosmic giver of the life energy and a microcosmic symbol of "enlightenment".
The Ankh, predescessor to the cross, is another symbol of the alchemical Magnum Opus.