If you're unhappy with life, maybe you're doing it wrong

Desire is the root cause of suffering. Desire for things one does not have, desire for things one cannot have. Desire for things that have been lost. Desire is nature's biggest motivator for progress and at the same time, the source of much of our pain. It's not just humans that suffer from desire, animals do as well. Its at the core of the natural world. The only way to escape the suffering caused by desire is to strive to separate yourself from it. This is what is at the core of many world religions. It is the central tenant of Buddhism. In Christianity, the state of mind resulting from the temporary release from desire is called "grace".