The specific idea that a room's true beauty is in the empty space within the roof and walls came from Laozi, a philosopher and the founder of Taoism, who held to the "aesthetic ideal of emptiness", believing that the mood should be captured in the imagination, and not so heavily dictated by what is physically present. Japanese design is based strongly on craftsmanship, beauty, elaboration, and delicacy. The design of interiors is very simple but made with attention to detail and intricacy. This sense of intricacy and simplicity in Japanese designs is still valued in modern Japan as it was in traditional Japan.