Abstract
The article analyzes the metaphysical approach to the rational cognition of the world of persons and things. It shows the way in which metaphysicians reveal the essential and universal properties of the world and the laws that govern their being. Among these properties, the most important are as follows: to be a thing (that is, to have a concretely determined essence), to be one (that is, to be non-contradictory in itself), to be separate or distinct (that is, to be sovereign in being), and also to be a vehicle of truth, good, and beauty. Among the laws of being, in turn, the article indicates the law of identity, the law of non-contradiction, the law of the excluded middle, the law of the reason of being, the law of finality, and the law of perfection. These laws primarily show the source and foundation of the rational order.