Hiarchy of angels "Angels are spirits," proclaimed St.Augustine! St. Thomas Aquinas believed that angels were pure spirit, having no matter or mass, and taking up no space; but Thomas believed angels could assume bodies at will. The purpose of angels is the same as mankind: to love and serve the Lord. However, being that angels are not material beings, and possibly from a different dimension, they can serve the Lord in many different ways. Angels have far greater will and intellect than we have. Whereas mankind mu