Magic
What you must keep in mind, in the use of magic, is that you must not attempt things which you could not imagine yourself doing with your current physical capabilities. This does not render the convenience of magic beyond you: While you may not be able to imagine stretching your arm across the room to grab a book, you could easily stand up, walk over, and retrieve it, and so, you may safely levitate the book to your hand with magic. This sort of reasoning allows for consistent, safe usage of your innate, God-given abilities, and allows for the expansion thereof through physical and mental fitness. If you ever have a question as to whether or not your magic usage is valid, do not hesitate to ask the clergy of your local church.