Following on daystar, also sorcery/medicine and astro-nomy/logy...
Moreover Azazyel taught men to make swords, knives, shields, breastplates, the fabrication of mirrors, and the workmanship of bracelets and ornaments, the use of paint, the beautifying of the eyebrows, the use of stones of every valuable and select kind, and all sorts of dyes, so that the world became altered. Impiety increased; fornication multiplied; and they transgressed and corrupted all their ways. Amazarak taught all the sorcerers, and dividers of roots : Armers taught the solution of sorcery; Barkayal taught the observers of the stars, Akibeel taught signs ; Tamiel taught astronomy ; And Asaradel taught the motion of the moon. (1 Enoch 8)
Yes, so these "fallen angels" taught mankind many early sciences since God, you know, would not since he, you know, prefers his slaves ignorant.
So... "True Christians" probably should not ever wear makeup or jewelry of any sort, use mirrors, or dyes. They also should not be astrophysicists since the basis for such comes from the teachings of evil fallen angels and as such should be viewed with as much horror as is sorcery.