Tanzil and Inzal, or "to send down" (Arabic تنزيل), refers to the act of descent of the pre-existing Qur'an through different Realms. The process by which Divine message come to the heart of messenger of God is tanzil or nuzul (to come down). As the Qur'an says, "With the truth we(God) have sent it down and with the truth it has come down." It designates positive religion, the letter of the revelation dictated by the angel to the prophet. It means to cause this revelation to descend from the higher world. According to hadith, the verses were sent down in special circumstances which are known as Asbab al-nuzul. However, in this view God himself is never the subject of coming down.