"The mother of spiritual knowledge or omniscience is mysticism, or the spiritual energy of the universe itself. Human spiritual energy equals mysticism and mysticism is something accessible to all those sincere seekers who have the correct training.
5,000 years ago the Yellow Emperor sought out achieved masters to receive their mystical instruction; 3,000 years prior, I Ching instruction was passed down orally. Thus for 8,000 years, mystical knowledge has been passed down from the Taoist sages to Master Ni, Hua Ching.
Mysticism presents another kind of knowledge that does not use senses or machines: omniscience. People generally accumulate knowledge by way of study and experience through their limited sensory capabilities and technological devices. However, these fail to detect that which is too big, like the universe, or that which is too small, like spiritual being. Through spiritual development, both the entirety of the universe and the spirits can be known.
Omniscience, before it becomes graspable is represented by a symbol or a picture. In this book, Hua-Ching Ni presents an introduction to mysticism as the ancients knew it and as it can be experienced today.'