We must learn to accept challenges without complaint and to face difficulties and uncertainties without fear. 
Man should not bemoan his lowly origin when Creator Sons pass through same experience to be considered worthy and competent to rule over their universe. 
Man should not blame God for those afflictions which are the natural result of the life which he chooses to live; neither should man complain of those experiences which are a part of life as it is lived on this world.  Prayer has turned many an irritable and complaining invalid into a paragon of patience and made him an inspiration to all other human sufferers. 
Never, since the marvellous bestowal of Jesus as the Planetary Prince of a world in isolation and rebellion, have any of the Material Sons or Daughters in Nebadon been tempted to complain of their assignments or to find fault with the difficulties of their planetary missions.  Elders of Nazareth complained about Jesus to Joseph and Mary after he draw a picture of the teacher. 
Judas did not think Nathaniel took his apostleship sufficiently seriously and once had the temerity to go secretly to Jesus and lodge complaint against him.  In Jesus' parable the workers in the vineyard complained that they were not paid more than those who had been hired last. 
When thinking men and women look upon Jesus as he offers up his life on the cross, they will hardly again permit themselves to complain at even the severest hardships of life, much less at petty harassments and their many purely fictitious grievances.  Jesus said: To suffer evil without complaint and without resistance, the purely negative method, is not enough. We have to return good for evil.