In traditional Japanese aesthetics, wabi-sabi is a world view centered on the acceptance of transience and imperfection. The aesthetic is sometimes described as one of beauty that is "imperfect, impermanent, and incomplete". It is a concept derived from the Buddhist teaching of the three marks of existence (sanbōin), specifically impermanence (mujō), suffering (ku) and emptiness or absence of self-nature (kū). Characteristics of the wabi-sabi aesthetic include asymmetry, roughness, simplicity, economy, austerity, modesty, intimacy, and appreciation of the ingenious integrity of natural objects and processes.