The social license yurodstvo granted was unusual and specific: a recognized holy fool could criticize and rebuke powerful figures, including tsars, in ways that would have been dangerous or impossible for anyone else in Russian society, since the yurodivy's apparent madness was understood to place their speech under a kind of divine rather than ordinary social authority, immune to the usual consequences of insolence toward a ruler. Russian historical tradition preserves accounts, of varying reliability, of holy fools publicly confronting Ivan the Terrible over his cruelty, a legend that captures the social function yurodstvo could serve as a sanctioned channel for criticism no formal institution of the period otherwise permitted.
The tradition's combination of genuine ascetic sanctity with behavior that could easily be mistaken for actual mental illness or simple vagrancy has made it a subject of ongoing scholarly caution, since distinguishing an authentic yurodivy from an ordinary beggar or a person experiencing genuine psychiatric illness was recognized as difficult even by contemporaries, and the Russian Orthodox Church historically exercised care before formally canonizing a holy fool as a saint. The figure passed into Russian secular literature as a recognizable type, most famously in the works of Fyodor Dostoevsky, whose characters draw repeatedly on yurodstvo's combination of apparent foolishness and hidden spiritual insight.