The "True Principle of Consciousness-only." The known world is an expression of mind and the original nature of the known world and the mind are the same. This mind nature is called true reality. Conversely， this true reality is the nature of mind. Here， the ideograph 性 （xing） refers to principle 理， which is true thusness. This condition of reality is perceived in fifth level of apprehension of the principle of Consciousness-only. In contrast to the manifest consciousness （which is the eight consciousnesses） which arises， change and ceases， this is the eternal unmanifest true thusness. The apprehension of perfectly accomplished reality.