On the basis of an opinion formed in the world, some spirits have believed that heavenly happiness consisted of a life of leisure, being waited on by others; but they were informed that there is never any happiness in idling around in order to be content. This would mean wanting the happiness of others for oneself, in which case no one would have any at all. This kind of life would be idle, not active, a life that would lead to atrophy. They might in fact have known that apart from an active life, a life has no happiness, and that idleness serves that life only for refreshment, in order to return them to the active life with more energy. Then they were shown in many ways that angelic life consists of worthwhile, thoughtful actions, actions that are useful to others, and that all the happiness angels have is found in service, derives from service, and is proportional to service.
So that these people might feel shame (people who have had the notion that heavenly joy consists of a life of leisure, inhaling eternal bliss) they are enabled to perceive what kind of life this would be. They see that it is thoroughly miserable; and once all their delight therefore dies away, they are very soon disgusted and nauseated.
from Heaven and Hell, Section 403