" have heard is that matter is the densest form of spirit and that spirit is the lightest form of matter. We can view our bodies as manifestations of spiritual energy. Our mind and daily thoughts are part of this energy, and they have a well-documented effect on matter and our bodies. Our daily thoughts and emotions, which are accompanied by a multitude of biochemical changes in our bodies, set up an electromagnetic field around us (and around every cell in our bodies) that attracts to us our vibratory equivalent. This tendency is known as the law of attraction and is the most fundamental law that governs the universe. Like is attracted to like. As we vibrate, so we attract. Or to state it more simply, birds of a feather flock together. "

― Christiane Northrup , Women's Bodies, Women's Wisdom: Creating Physical and Emotional Health and Healing