The thought criminals and the eternal mea culpa.

"Purity and Confession Two other features of totalism are a demand for purity and a cult of confession. The demand for purity is a call for radical separation of good and evil within the environment and within oneself.
Purification is a continuing process, often institutionalized in the cult of confession, which enforces conformity through guilt and shame evoked by mutual criticism and self-criticism in small groups.
Repetitious confession, especially in required meetings, often expresses an arrogance in the name of humility. As Camus wrote: "I practice the profession of penitence to be able to end up as a judge," and, "The more I accuse myself, the more I have a right to judge you."
Three further aspects of ideological totalism are "sacred science," "loading of the language," and the principle of "doctrine over person."

https://culteducation.com/brainwashing1.html