The text examines the ontological relationship between unity and multiplicity based on the ancient principle that being is necessarily one. The author analyzes the conditions under which two or more beings can form a new integrated unity to which being can be attributed. The reflection distinguishes between true internal integrity and a mere sum of parts. It further addresses the issues of isolation and connection in the real world; it argues that the total isolation of a being would exclude it from the world, in which everything is interconnected. However, it also emphasizes that the existence of relationships and connections does not automatically mean the creation of a higher type of unity. In the real world, connections and disconnections exist side by side, which complicates the possibility of establishing a universal unity of the world through mere links. The work thus provides philosophical insight into the problem of how to define the being of a whole composed of several parts and what role the nature of their interconnection plays in this process.