Speak your mind, and if you are in trouble, you will defect! "

The main meaning of this sentence is that people who often talk about the national righteousness may not be able to stick to their own integrity when facing danger.

This sentence implies that some people, judging from his words, are people who understand the righteousness and can estimate national integrity, but many times such people cannot stand the test. As long as they face a certain degree of danger, they may change their position and their integrity can be forgotten. In other words, people whose words and deeds are very different often talk about the national righteousness, but they easily change their ethics in times of crisis.

To sum up, the meaning of this sentence is: people who often talk about national justice will not stick to their integrity when facing danger.

Extended data:

We can't be too absolute about anything, of course, including words that have certain absolute significance, such as "keep your word and change your mind when things happen." People who are full of national justice are not short of people who stand up in the face of danger, but many times this is also a minority.

Regarding national integrity and spiritual integrity, what we should do is to engrave them in our hearts, instead of turning them into topics we relish. A person's spiritual integrity may not change anything, but if the whole nation has such spiritual integrity, it will become an invincible myth.