52:5.2

When the worlds have become ripe for spiritualization, the bestowal Son arrives. These Sons always belong to the Magisterial or Avonal order except in that case, once in each local universe, when the Creator Son prepares for his terminal bestowal on some evolutionary world, as occurred when Michael of Nebadon appeared on Urantia to bestow himself upon your mortal races. Only one world in near ten million can enjoy such a gift; all other worlds are spiritually advanced by the bestowal of a Paradise Son of the Avonal order.