The process of forming a visualization. To form a mental image. It may or may not be visible. It is the technique for creating something on the astral plane which must eventually manifest on the physical plane.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...