Ключевые слова. онтология, бытие, истина, логос, объект, субъект, Гераклит, Платон, Аристотель, Хайдеггер.
Abstract. The article aims to analyse not gnosiological, but ontological aspects of truth. Taking into account the currency of gnosiological truth in Classical and Modern philosophy, the author found ontological interpretation of truth in Ancient Greek philosophy. The author raised the issue of the relationship between the subject and the object of knowledge and arrived at a conclusion that the object perceives whereas the subject is perceived in Greek philosophy. Being opens itself to the subject in the case. Active being and passive recipient are the basis of the ontological truth.