This is an attempt at tracing Czeslaw Milosz's creative impulse, called by the writer himself 'the longing for a more spacious form'. In Milosz's work this longing found its expression in polymorphism, syncretism, and genological diversity. These general statements are followed by a critical interpretation of his work in terms of disorder, fragmentation, shapelessness, bricolage, disintegration, polyglossia, or even genological aberration and deformation. Traditionally Milosz's varietas was believed to follow the model of the Book or the principle of 'silva rerum'. This article points to a third interpretative key. Milosz's poetic vocation, referred to the writer himself as a 'revelation' and described in the language of the lyric of epiphany or the experience of a medium, is identified as a return to the classical 'genus universum', an idea of one mythical source of all knowledge.