Visualization was occasionally mentioned in the Cayce readings as a means of changing one's experience. However, the readings also warned that this technique should be used in accordance with one's ideals. In other words, be careful what you visualize, you may get it.
A practical application of visualization was often suggested to improve the efficacy of the physical treatments. The person receiving therapy was told to visualize the therapies working in the body - to "see" healing occurring during the actual treatments. This use of visualization was thus a safe and natural application of the principle "mind is the builder."