The definition of "blasphemy" was introduced into French law in the 13th century (after great debate among the French Moralists), based on the definition given by St. Thomas Aquinas: a sin of language, "a failure to declare one's faith", thus representing an attack on the purity of religion.
Definisi "penistaan agama" ditambahkan ke hukum Prancis pada abad ke-13 (setelah diperdebatkan panjang lebar oleh kaum moralis Prancis) berdasarkan definisi dari St. Thomas Aquinas: dosa bahasa, "keengganan mengakui kepercayaan seseorang", yang mencerminkan serangan terhadap kesucian agama.