Present article addresses studying tolerance as a factor of personality stability, which manifests on the level of interpersonal relationships and on the level of intra-personal system of stressors resistance. The article includes theoretical analysis of the tolerance construct as an integrative personality formation. It explores the question of psychological stability of a personality in the context of tolerance modes. We present the results of an empirical study in college students, which define the presence of systemic connections between external and internal tolerance modes on the basis of positive connections (between acceptance of interaction partner and emotional stability; between feminine traits and level of general and ethnic tolerance; between masculine traits and emotional stability), as well as negative connections (between tolerance towards others and ability for independent decision-making in emotionally strained situation; between character traits, which are defined by organic lesions of the nervous system and communicative tolerance; between delinquency, predominance of masculine traits and level of general tolerance or tolerance as a personality trait; between extroversive personality orientation and tolerance as a personality trait).