Symbol of alchemy and sacred geometry. Three primes: spirit, soul, body and 4 basic elements: Earth, Water, Air, Fire 炼金术和神圣几何学的象征。黑色隔离背景上线条纹身的线性字符插图。三个素数：精神、灵魂、身体和4个基本要素：地球、水、空气、火