One of the reasons I apply process to my magical work is because with good processes in place, it makes easier to innovate and experiment with magic. I learned that in the business world and I've applied to my spiritual practices over the years to great success. You can actually learn a lot by taking the practice of one discipline and applying it to another discipline. In business, processes are used to solve problems, design and implement solutions, and to encourage creativity. Process encourages creativity by cutting out extraneous busy work, to focus on what really works, but in order to discover what works you necessarily need to work the process.
A lot of times creativity is treated as a chaotic experience, which occurs when a person is inspired. But in my experience, creativity is quite structured. Process provides the necessary structure for creativity to flourish in. Whether I'm writing, painting, or practicing magic, having a process in place allows me to work with my creativity as a resource. I'm not just waiting for inspiration to hit me...I'm actively cultivating it as part of my process.
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