The Cho Ku Rei is a sign of strength. Reiki energy will flow even if you don’t use it; nevertheless, it is believed that when you do, the energy inside of you will considerably rise. It’s the equivalent of upgrading a lamp’s bulb from 50 to 500 watts. This symbol can be used at the start of a healing session or whenever more strength is required. This symbol is meant to be used for physical healing only.