Buddha's doctrine: Man suffers because of his craving to possess and keep forever things which are essentially impermanent...this frustration of the desire to possess is the immediate cause of suffering.
To put it still more plainly: the desire for security and the feeling of insecurity are the same thing. To hold your breath is to lose your breath. A society based on the quest for security is nothing but a breath-retention contest in which everyone is as taut as a drum and as purple as a beet.
It's so important to consider this question: What do I desire?
We are at war between consciousness and nature, between the desire for permanence and the fact of flux. It is ourself against ourselves.
The materialism of modern civilization is paradoxically founded on a hatred of materiality, a goal-oriented desire to obliterate all natural limits through technology, imposing an abstract grid over nature.