華厳経 (Kegon-Kyo) is a teaching about the mind. It says that everything comes from the mind. It also says that all things connect with each other without any problems. The name "華厳 (Kegon)Kegon" means a world decorated with many flowers. A famous phrase "Sangai Yuishin" comes from 華厳経 (Kegon-Kyo). This phrase is often used in Zen. AOCUM was born from the ideas of 華厳経 (Kegon-Kyo).