This text explores the philosophical definition of the concept of unity and its logical relationship to multiplicity. The author argues that multiplicity cannot exist without the units into which it is divided. Central to the discussion is the relationship between the intentional act and the concept, which serves as a mental tool for refining the unification of thought. While a concept is distinguishable from the act and remains reusable across contexts, the intentional act is responsible for maintaining the concept's unity. Furthermore, the author distinguishes between genuine unity and the pseudo-unity of an intentional object. This objective unity is not immediately perceptible but is based on a complex system of logical judgments that require constant verification. Using geometric shapes as examples, the text demonstrates that their integrity stems from logical connections rather than direct intuition. Ultimately, the work examines the internal structure of thought and the mechanisms through which we achieve coherence in conceptualizing the world.