Devotion (bhakti),the continuous focus of desire on a particular spiritual ideal, is universally used in religions around the world, and also one of the most effective tools. Bhakti is called "the science of devotion" in AYP. It truly is a science, because it has known causes and effects which can be harnessed by diligent practitioners. If we know how to redirect our emotional energy toward our highest ideal, whether it be "God" or "Truth" or "Love," then huge invisible forces will be turned loose that bring knowledge to us in an avalanche. Such is the power of bhakti.