The Buddha said, “Monks, if you want to be free from suffering, you should contemplate knowing how much is enough. By knowing it you are in the place of enjoyment and peacefulness. If you know how much is enough, you are contented even when you sleep on the ground.
If you don’t know it, you are discontented even when you are in heaven. You can feel poor even if you have much wealth. You may be constantly pulled by the five sense desires and pitied by those who know how much is enough. This is called “to know how much is enough.”