This document summarizes key points from Part 22 of The Master Key System about how thoughts influence physical health. It discusses that thoughts are like seeds planted in the subconscious mind that can sprout and grow. Thoughts of fear, worry or anxiety can manifest as disease, while positive thoughts can promote health. The body's cells respond to mental images, so visualizing perfect health can help the body heal and eliminate chronic ailments. As we control our thoughts, we can use this law of vibration to produce desirable physical conditions.