Thesis of the report: Plato’s doctrine – first appearance of ontognoseological principle in history of philosophy. Unity of thinking and being appears for the first time not as abstract identity, but as correlation of soul and object in cognitive process, which ends in actual unity in the idea. Conclusion of the report: Plato’s dialogues are 1) requisite propaedeutic in special philosophical education and 2) qualitative didactic material for moral education of current students in conditions of skepticism and indifferent pluralism.

Ontognoseology, mind, intellect, cognition, being, actuality, dialectics, idea