Everything is energy and everything is affecting everything else in various positive and negative ways. Physical life unfolds according to energy, or "karma". It's why reading highly advanced spiritual teachings like the Buddha's is so powerfully uplifting and life changing, and it's why Gandhi was able to ward off the entire British empire by simply being peaceful.
If you simply change yourself, and what's going on inside your own mind and heart, you'll be absolutely amazed at just how radically your "outside" life changes automatically as a result. If you don't ever put it to practice for yourself, then you'll never be able to see the profound truth of this. All of these words being written right now are absolutely worthless unless the information is put to practice in one's own life. Life is not about merely obtaining external "proof". It's about firsthand verification. Believe nothing blindly, no matter who it comes from. Come to know it yourself, by being that truth yourself.
The basic elemental teaching of every Enlightened teacher throughout history is to let go of negatives, and to adopt positives. Personally, I gave up listening to heavy metal because it's aggressive, violent, and negative in nature. It has nothing at all to do with Peace, which is identical to the condition of Enlightenment. And the television was given up for basically the same reason. It's entertainment for the mind, when the individual personhood of the mind is now seen as the thing to be transcended and left behind.