Abstract
The text offers an introductory study to one of the most significant writings on nature, method and ethos of the modern science, Blaise Pascal's Preface to the Treatise on Vacuum. The void is conceived as a border phenomenon between scientific reasoning and imagination and as a notion lying at the heart of the traditional understanding of nature - continuous, harmonic unity in diversity.
The background of the study consists in an exposition of the history of void as emerging in Galileo's and Torricelli Florence, which, at the same time, expounds the challenges and limits of its scientific grounding. The Pascalian ideas on possibility of human knowledge, experimental method, authority and progress are shown to be consequences of his peculiar approach to the question of void.