This lecture explores the concepts of truth and uniqueness as understood in Western thought, emphasizing the contrast between natural and historical reality. It discusses Aristotle's concept of uniqueness in monads and Leibniz's extreme case of attributing uniqueness. The focus is on the significance of external, realized uniqueness of events that assert themselves in the world through the reactions of other events. Human beings, unlike atoms or particles, are capable of perceiving and reacting to uniqueness, which is the foundation of life and history. Special attention is given to the role of dialogue (dialogos) as a path to truth, distinguishing it from mere conversation and marking it as a primary experience in human history, as opposed to the mere description of nature. The experience of dialogue, where truth emerges in the midst of conversation, is key to understanding history and human existence, stressing that truth is not immanent to history but transcends it and illuminates it.