The Bible later makes mention of a third type of angel found in the Merkabah called "Seraphim" (lit. "burning") angels. These angels appear like flashes of fire continuously ascending and descending. These "Seraphim" angels power the movement of the chariot. In the hierarchy of these angels, "Seraphim" are the highest, that is, closest to God, followed by the "Hayyot", which are followed by the "Ophanim." The chariot is in a constant state of motion, and the energy behind this movement runs according to this hierarchy. The movement of the "Ophanim" is controlled by the "Living creatures", or Hayyot, while the movement of the "Hayyot" is controlled by the "Seraphim". The movement of all the angels of the chariot is controlled by the "Likeness of a Man" on the Throne.