Buddhism teaches that there is a ninth consciousness, which Nichiren Daishonin identified as the Buddha nature, or Nam-myoho-renge-kyo. It is the basis of all life's functions and is known as the 'amala' or 'fundamentally pure' consciousness, shared at the most profound level with all life. As we chant Nam-myoho-renge-kyo, so life-force comes from the ninth consciousness, purifying the internal causes and effects that lie in the eighth, and improving the way our sixth and seventh consciousnesses function.
The first five 'consciousnesses' are our basic senses of sight, hearing, touch, smell and taste, which we use to take in information from outside ourselves in order to understand what is going on in the world. Imagine the moment of birth. The baby at that moment is aware of sound, of smell, touch, taste and sight. Like the baby we become attached to the world to such a degree that, for many, the world in all its complexities continues to hold our attention and we remain ignorant of the working of the deeper 'layers' of consciousness.