Fa (philosophy)

Fa is a concept in Chinese philosophy that concerns aspects of ethics, logic, and law. Although it can be accurately translated as 'law' in some contexts, especially modern Chinese, it refers to a 'model' or 'standard' for the performance of behavior in most ancient texts, namely the Mozi, with a prominent example including the performance of carpentry. Although theoretically earlier, Fa comes to prominence in the Mohist school of thought. An administrative use of fa standards is prominently elaborated in Legalism, but the school of names also used fa (models) for litigation. Given its broadness, the term fa even included medical models (theories).

Fa was still considered important by Warring States period Confucians. Xunzi, whose work would ultimately be foundational to Confucian philosophy during the Han dynasty, took up fa, suggesting that standards could only be properly assessed by the Confucian sage (聖; shèng), and that the most important fa were the very rituals that Mozi had ridiculed for their ostentatious waste and lack of benefit for the people at large.

In Han Fei's philosophy, the king is the sole source of fa (including 'law'), taught to the common people so that there would be a harmonious society free of chance occurrences, disorder, and "appeal to privilege". High officials were not to be held above the fa, nor were they allowed to independently create their own fa, uniting both executive fiat and rule of law.

Despite a usage by Shang Yang including penal law, in Imperial China fa more commonly referred to government institutions, such as for agricultural loans, than to law per se. The Qin dynasty differentiated the body of statues under the term lu 律, though lu does include a similar root meaning of measurement (like Metre). Originally meaning pitch pipe, it referred to a chromatic scale subdividing four solar seasons as twelve, with much of Qin law being administrative.