Even though our body has many millions of cells; each is significant. Even a single cell in our inner ear canal can cause an imbalance in our body. Imagine the golden lite of a sparkler filling your whole being and all the cells in your body. This kind of visualization increases our life span and helps us be free of disease.
I think each of us is drawn to different forms of visualization possibly because of some of our experiences in life both spiritual and physical. As a boy looking at a sparkler 🎇 fascinated me because the light would spread out and envelope the area with luminous, dazzling, radiance. Later as a young man I had a few experiences with seeing this shimmering display inside myself. It is an experience one never forgets and longs for again as it was accompanied by bliss. Although much like human experiences, they are for a time, and never again, and we must be open to the new experiences and understandings that surface as we continue our meditation and spiritual practice. I do think though that various experiences we have had in the past help us in visualization practices in the present because of there realness to our personal experiences.