48:4.17

The higher the mortal species, the greater the stress and the greater the capacity for humor as well as the necessity for it. In the spirit world the opposite is true: The higher we ascend, the less the need for the diversions of reversion experiences. But proceeding down the scale of spirit life from Paradise to the seraphic hosts, there is an increasing need for the mission of mirth and the ministry of merriment. Those beings who most need the refreshment of periodic reversion to the intellectual status of previous experiences are the higher types of the human species, the morontians, angels, and the Material Sons, together with all similar types of personality.