Final answer:
The Nazi speaker aims to control people's thoughts and prevent any ideas contradicting the Nazi ideology from influencing them.
Step-by-step explanation:
The Nazi speaker is referring to the importance of controlling the minds and thoughts of the people in order to maintain power and control over them. By stopping their enemies from reaching into their minds, the speaker means preventing any influence or ideas that go against the Nazi ideology from infiltrating the minds of the people. This was a crucial aspect of Nazi propaganda, as they aimed to manipulate and indoctrinate the German population to support their policies and beliefs.
Learn more about Influence and control of minds in Nazi propaganda