The world is built on universal dualities or pairs of opposites: light - darkness, heat - cold, male - female, creation - destruction, active - passive, up - down, etc. Human nature is such that from any integral phenomenon he can perceive only one pole of it. Only after experiencing the two poles of duality can a person realize the integrity of a certain phenomenon and advance in his development. A person can realize that light and darkness are parts of one whole, that there is no struggle or conflict between them.

Universal dualities in everyday life are experienced by the human psyche as psychological states and attitudes, such as “aggressor-victim”, “euphoria-depression”, “greatness-insignificance”, “good-evil”, “material-spiritual”, etc.