According to a dictum of Heinz von Foerster telling us that his life and work were inseparable, this booklet combines Heinz von Foerster’s five 'Stanford lectures on constructivist epistemology' from 1983 and their original manuscripts on CD-ROM with a series of photographs documenting his life. English Translation of the volume ", ISBN 978-3-901941-08-5, containing the identical CD-ROM.