Final answer:
The question seems to refer to a statement by Sigmund Jähn but the provided materials do not contain any direct information or context about his speech and instead mention Sigmund Freud and a historical conversation by Joseph Stalin.
Step-by-step explanation:
It appears that the student's question relates to a statement made by Sigmund Jähn in the context of a historical dialogue.
However, the provided information and references pertain to Sigmund Freud, a figure in the history of psychology, and a conversation by Joseph Stalin with German author Emil Ludwig from 1931. The details do not directly mention Sigmund Jähn's speech, nor do they provide a clear context for answering the question about what he 'said' in his 'speech'. It seems there might be a mix-up with the materials or an incorrect reference provided.