The basic theory is this:
Life is suffering. You can never really achieve peace. Happiness is just the flip side of sadness and no material or emotional pleasure will sustain the longing in your soul to understand itself.
The only way to eliminate suffering is to follow Buddha’s precepts to sever your attachments to the world. This doesn’t mean that you cut yourself off but rather that you do all that you do without expectation or desire. You simply do.
