Internal belief of investigator as process of understanding of the objective validity

Article is devoted to the study of formation of such subjective-objective category as internal belief of investigator. The author proves mat true should be both final internal belief and the way of its cognition (stages, phases) providing the validity of formation of internal belief on each stage. Considering understanding as a fundamental principle of cogitative activity of a person the author considers it as constant change of the attitude of a subject towards the objects of knowledge