I spent a few years in early life as a Wiccan. Magic tends to be a big part of that.
Magic, or spells, tend to be kind of like prayers with props, in my opinion. You might petition the aid of a deity, but you may not, too. At the very least, some kind of energy is acknowledged, but the person may also utilize that energy which comes from the earth, or from the self. You're not strictly relying on a divinity or energy, but you may be working with it.
Typically, you are wanting to create some kind of change and try to get the ball rolling by a combination of will and proper correspondences(right time, place, materials). Some think it all just affects the person's mentality, others think it creates a space for change in the fabric of things(or a combination of both).