“spell” in Old English meant “speak”, and casting a spell means speaking words of power such that they invoke something. How is that different from prayer? A prayer as an invocation of the Holy Spirit, that it come down and affect the lives of the people, and the world. It’s the only truly evident power. Teaching and transformation can only occur through its grace. Therefore, a wizard is simply someone who has the faith to cast these spells, and invoke the Holy Spirit.