"Let us now imagine that one day something in our greengrocer snaps and he stops putting up the slogans merely to ingratiate himself. He stops voting in elections he knows are a farce. He begins to say what he really thinks at political meetings. And he even finds the strength in himself to express solidarity with those whom his conscience commands him to support. In this revolt the greengrocer steps out of living within the lie. He rejects the ritual and breaks the rules of the game. He discovers once more his suppressed identity and dignity. He gives his freedom a concrete significance. His revolt is an attempt to live within the truth.
The bill is not long in coming. He will be relieved of his post as manager of the shop and transferred to the warehouse. His pay will be reduced. His hopes for a holiday in Bulgaria will evaporate. His children's access to higher education will be threatened. His superiors will harass him and his fellow workers will wonder about him. Most of those who apply these sanctions, however, will not do so from any authentic inner conviction but simply under pressure from conditions, the same conditions that once pressured the greengrocer to display the official slogans. They will persecute the greengrocer either because it is expected of them, or to demonstrate their loyalty, or simply as part of the general panorama, to which belongs an awareness that this is how situations of this sort are dealt with, that this, in fact, is how things are always done, particularly if one is not to become suspect oneself. The executors, therefore, behave essentially like everyone else, to a greater or lesser degree: as components of the post-totalitarian system, as agents of its automatism, as petty instruments of the social auto-totality.
Thus the power structure, through the agency of those who carry out the sanctions, those anonymous components of the system, will spew the greengrocer from its mouth. The system, through its alienating presence ín people, will punish him for his rebellion. It must do so because the logic of its automatism and self-defense dictate it. The greengrocer has not committed a simple, individual offense, isolated in its own uniqueness, but something incomparably more serious. By breaking the rules of the game, he has disrupted the game as such. He has exposed it as a mere game. He has shattered the world of appearances, the fundamental pillar of the system. He has upset the power structure by tearing apart what holds it together. He has demonstrated that living a lie is living a lie. He has broken through the exalted facade of the system and exposed the real, base foundations of power. He has said that the emperor is naked. And because the emperor is in fact naked, something extremely dangerous has happened: by his action, the greengrocer has addressed the world. He has enabled everyone to peer behind the curtain. He has shown everyone that it is possible to live within the truth. Living within the lie can constitute the system only if it is universal. The principle must embrace and permeate everything. There are no terms whatsoever on which it can co-exist with living within the truth, and therefore everyone who steps out of line denies it in principle and threatens it in its entirety."
https://en.wikipedia.org/wiki/The_Power_of_the_Powerless#Havel's_greengrocer