20 years ago I had the good fortune to write a doctoral dissertation in agricultural education on biodynamics at the College of Agricultural Scienc-es, Penn State University. It was an honour and a pleasure. Encouraged by my friends and colleagues in the biodynamic movement I felt carried by the wings of good spirits.
Today I am excited to publish this dissertation as a book, so that it be-comes more available for all those interested in biodynamics. Even as I lay in bed, still paralyzed from my recent stroke, my love for biodynamics has kept me going (thanks to the loving care and hard-working cooperation of my wife Kati, I am able to publish online courses and this book).