Why do theists suffer while atheists appear to be happy in the world?

Swami replied:- When Dharmaraja went to the upper worlds along with his father, who is the God of Justice, he saw his brothers in hell and the evil Kauravas in heaven. He was shocked and asked his father about this. The God of Justice replied that his brothers had little sin and a lot of fruits of good deeds. Hence they would first suffer the little sin in hell and then go to heaven forever. The Kauravas were associated with very little good fruits and lots of sins. Hence they would first enjoy the fruits of their good deeds in heaven and then go to hell forever. This is the tradition of the administration of the Lord. Therefore good devotees will suffer the little sin in this temporary human life and will enjoy the fruits of their good deeds forever in heaven. The atheists will enjoy the fruits of their small amount of good deeds in this temporary life and will go to hell forever for their sins. Another use of such arrangement is that the devotee will be tempted to become an atheist seeing the happy life of the atheist in this temporary life. Thus the devotees are tested by the atheists. The administration of the Lord has many angles of understanding unlike the human administration here.