Have you ever wondered about music's power? It can bring zest to life. It can cheer the downhearted or add melancholy to an already sad day. It has the power to excite or to calm. We hear it in parades, in movies, in our car stereos and in our headsets. Music is such an integral part of life that it can change our mood - our heart rate - and even the structure of our brains. Through music we can feel transported to God's throne - but music may also...