Rudolf Steiner, the founder of the Biodynamic philosophy, articulated the wisdom of ancient spiritual knowledge in concepts appropriate to the modern human being. Chief among these is the understanding that spirit and matter are one. This understanding can inform all of our undertakings in life, including how we work in society, in education, in medicine, and, of course, as agriculturalists. An understanding of how Rudolf Steiner refers to spirit, matter, earthly, cosmic, elements and ethers and more is essential for working with the real principles of Biodynamics.