Confession frees, but power reduces one to silence; truth does not belong to the order of power, but shares an origincal affinity with freedom: traditional themes in philosophy, which a political history of truth would have to overturn by showing that truth is not by nature free--nor error servile--but that its production is thoroughly imbued with relations of power. The confession is an example of this.
Michel Foucault (1990). “The History of Sexuality: An Introduction”, Vintage