This text explores the phenomenological concept of the "preliminary whole" and the "world horizon," which serves as the essential framework for all human perception. The author argues that every sensory presence is inherently part of a broader whole that precedes any act of objectification. Although describing this whole is challenging due to a language biased toward objective psychology, it cannot be reduced to simple sensory data or the products of memory and imagination. The world horizon is not a construct assembled from discrete impressions but an original structure from which individual things emerge as explications and into which they recede. Consequently, human life is fundamentally characterized as being-in-the-world, existing within this preliminary whole that remains constant despite the continuous flux of specific objects. The text rejects psychological interpretations of the horizon, emphasizing its primary and indispensable nature within human experience as an original descriptive fact that cannot be decomposed into isolated elements.