Some experts are so convinced colors have a strong effect on us that they believe colors can be used to heal. They say that by concentrating our thoughts on certain colors, we can cause energy to go to the parts of the body that need treatment. White light is said to be cleansing, and it can balance the body's entire system. Yellow stimulates the mind and creats a positive attitude, so it can help agained depression. Green, which has a calming and restful effect, is supposed to be good for heart conditions. Books are now avaitable that teach people how to heal with color. These books provide long lists of ailments and the colors that can heal them.