The second noble truth teaches that the true root of suffering is the craving for happiness itself. This craving is the result of the unrealistic expectation that life should be a source of unchangeable happiness as discussed under the first noble truth. Craving is what transforms the occasionally painful process of life into an ongoing cycle of agony and unbearable suffering at worst or a life of subtle agitation and anxiety at best. Thus, while external circumstances can indeed bring about uncomfortable or tragic experiences, it is the internal craving that turns mere pain into suffering. Indeed, craving can even spoil pleasant circumstances with its incessant demands and impoverished outlook on life. All of this is not to deny or denigrate the experiences of those who have or are experiencing affliction, exploitation, or tragedy. The point is that when one lets craving compound painful circumstances with emotional suffering or lets craving spoil even pleasant circumstances, then one has truly given up one’s power and is destined for a life determined by the forces of greed, anger and ignorance which are naturally generated in reaction to suffering.
Open Your Eyes, p166-167