St. John's Shield, Herbal Flower Oil, 4 oz, Flower Essence ServicesFlower Essence Services St. John's Shield, Herbal Flower Oil The essential quality of St. John's Shield is its capacity to carry light into the dark well of the soul, providing a source of inner emotional radiance. This marvelous herb has a wide panorama of therapeutic possibilities. In addition to obvious depression and feelings of immobilization, it is very beneficial for "Seasonal Affective Disorder" from which many people suffer during winter,