So the beginning of tranquility has been explained. As for tranquility, it is the matter to which the soul is at peace because of what it was promised or because of what occurred in one’s soul of requesting a certain matter. It is called tranquility because if it occurs, it cuts off the presence of a desire for something other than what the soul is at ease with. Hence, the knife is called a knife because its owner cuts with it. What can be cut off with, and this word is derived from stillness, which is steadfastness, and it is the opposite of movement, for movement is a shift, so stillness gives stability to what the soul rests in, even if it rests in movement, this is its reality, and that does not happen except from reading or watching, so it descends upon them while they are believers, and it transports them by descending from the level of what they were in. Believers to the position of witnessing this, which is their faith being multiplied by sight so that they will increase i