The evolution from medu neter ('words of the gods,' hieroglyphics) through hieratic to demotic script traces a three-thousand-year arc of increasing abstraction in Egyptian sacred writing. Hieroglyphs, as described by Clement of Alexandria and visible on every temple wall from Karnak to Philae, functioned simultaneously as pictures, phonetic signs, and determinatives — each glyph carrying layers of meaning that the later cursive scripts progressively compressed. Hieratic, the priestly shorthand used on papyri from the Old Kingdom onward, retained the structure of hieroglyphs while sacrificing their pictorial immediacy; demotic, emerging in the Late Period, abstracted further still, becoming the script of everyday commerce and administration. This progression from sacred image to functional sign is an internal Egyptian development — the same tradition that carved the Rosetta Stone in all three registers understood that the power of medu neter lay not in the pictures themselves but in the relationships between them.