這是一本靈性如何到達自然境界的書，修養心性是所有修練的基礎。修練就是在生活之中的點點滴滴，要能體會自己的意識和行為是否自然了？然而，這「自然」是映照自靈性的自然；本篇內容分為三部分(一)心性是靈性修練的磐石：什麼是心性，心性與人性有什麼不同？心性是所有修練的磐石，大道如何做心性的評量？為什麼說：「心性上天的標準是自然」？(二)各宗派之心性論：佛道儒之心性論是什麼？中國哲學的心性發展過程如何？心性如何轉化與傳示？(三)自然之境界：哲學家們的自然觀念是什麼？理學論述的自然概念又是什麼？心性是靈性的指代，光的修練是在使靈性恢復其本質的自然，道的心就是自然。
This book exhibits how spirituality reaches nature reality. Practice spirituality is the foundation of all practices. Spiritual practice is involved in daily activities. Spiritual practice is to grow awareness how one's consciousness and behaviors are following the rule of nature. The nature here refers to spiritual nature. This book contains three sections. First is to identify that the spiritual nature is the basic of spiritual practice. What is the spiritual nature? How does it differ from human nature? the spiritual nature is the basic of all practice. How does the Great Tao measure the spirituality nature? What is the saying that the universal standard assessment of spirituality is nature? Second section is to discuss the spirituality studies from different divisions. What do the spirituality theories differ among Buddhism, Taoism, and confucianism? What is the spiritual evolution in Chinese philosophy? How is spirituality progressed and publicized? The third section is to understand the reality of nature. What are philosophers' concepts of nature? What is the concept of nature in Neo-confucianism? Spirituality is spiritual reality. The practice of light is to bring the essence of nature into spiritual reality. The heart of Tao is nature.
劉江坤，生於1951年，管理學碩士。生平熱衷於佛學、道學的研究，2004年始加入靈學的探討，成為「衡山天眼靈力研究會」研究學員之一，歷經十多年親身體驗靈魂光能量修練的生命大解密，現將一些研修心得編寫成書分享給有緣人。
《大道靈性學術系列》
1. 靈魂光之真理實相 (靈學篇)
2. 能量療癒－靈性能量之體驗與療癒 (靈能篇)
3. 大道－靈性模式的修練 (靈修篇)
4. 天眼－第三眼進入更高人類精神次元 (靈力篇)
5. 死亡之實相－靈魂超生探究之新生死學 (生死篇)
6. 心性自然－靈性之修練與心性評量 (養性篇)
Chiang Kuen Liu, also known as Richard Liu, was born in 1951. He earned a Master Degree in Management. He devoted himself to Buddhism and Taoism in his early life. He then advanced his spiritual study and pressed on the exploration of leading-edge parapsychology in 2004. He became one of the academic researchers of the "Hengshan Clairvoyance Spiritual Power Research Society". With over 10 years of personal practice on decoding spiritual energy, Chiang Kuen has unveiled the mystery of life by presenting six volumes of spiritual practice wisdom to share with people who come across the path.
