Praying mantis egg cases have been used for thousands of years in Traditional Chinese Medicine. They are classified as being an herb that helps stabilize and bind body fluids and Jing (Essence) in the body. The insects have a long history as a symbol of stillness, agility and quickness. Two separate martial art schools are named after the praying mantis and many cultures believe they are messengers from god. So, pay attention if you stumble upon a praying mantis. You may be receiving a message.