Law of Thought and Attraction
Also:We are what we think

From Albertson Memorial Church of Spiritualism:

The Law of Thought and Attraction: The tool of the Spirit is Mind, and like any tool, Mind can be used to build and unify, or to destroy and fragment. We are what we think. When Mind creates and sends forth a thought vibration, it will seek fertile soil for growth. If none exists, it will whither and die. Thus, the importance of creating within and around us an aura which will nurture and strengthen Divine thought and not allow that which opposes the Spirit to grow. Spiritualism addresses this directly through an understanding of the Body-Mind-Soul relationship and manifests this understanding through the Ministry of Healing.