The phrase: "Keep your mouth shut" is known to everyone. It was used before, it is valuable now. In the last century, during the war, it was very important to remain silent about what you know. After all, having blabbed out of stupidity, it was possible to reveal the secret of another person or some military secrets, and spies were everywhere.
After all, how did they find out most of the necessary and important information? Yes, it was from chatty people who could tell a completely stranger behind a glass everything they knew. At the same time, not making sure that the person sitting opposite is not a spy, but an honest fellow.
Those who reveal secrets of others are not liked by another person in society. After all, this person does not take into account the personality of another or the country as a whole. His desire to brag about something new leads to serious consequences.
The Soviet authorities understood the complexity of wartime, they also knew what our people had weaknesses. So, they created warning posters, propaganda and motivational posters. And if a person is weak in language, then such a poster reminded him that he could tell his secret to a spy, and the whole country could suffer from this.
Of course, most people considered these posters to be strong motivators, and not everyone wants to be known as a chatterbox. As for the war, someone's life could depend on the disclosure of information. After all, the spies were then in intelligence, in order to lurk in confidence in a person, and to get out all the necessary information. After which the enemies carried out their most insidious plans.
Looking at the Soviet posters, you understand how correct the actions of the authorities were, which wanted to support the people and motivate them. In such slogans is our strength. Each person looked with pride at such posters, associating precisely himself, and thinking over his actions.
Alphonse Mucha Pictures