How to See the Holy Spirit, Angels, and Demons

Are God, angels, and demons really invisible? Or can the spirits be seen with human eyes, through the lens of Church Ethics? The gift of discerning of spirits is indispensible to the study of church ethics.Ignatius of Loyola, founder of the Society of Jesus (Jesuits), wrote two sets of Rules for Discerning of Spirits in his Spiritual Exercises in the early 1500s. He taught how the church can recei...