Rudolph Steiner
If you are not familiar with the works of Rudolph Steiner-you should be! Rudolph Steiner was a brilliant teacher, writer, thinker, human being. He is the founder of Anthroposophy, a spiritual path of knowledge. He is also the founder of Waldorf Education, Biodynamic Farming, Anthroposophic Medicine and a form of movement called Eurythmy, among other things.
His writings on all these subjects are vast, and not easy reading, but highly worth the effort. I recommend reading Theosophy. Also, I am currently re-reading The Philosophy of Freedom. Most of Steiner’s books can and should be read and re-read. I cannot recommend delving into the works of Rudolph Steiner enough.