This study intends to study the problem of knowledge in Blaise Pascal, according to his conception of the geometric method applied to the knowledge of nature and techniques and on his efforts for another type of knowledge that can be applied to the "supernatural" reality (faith, man, moral, customs, politics). To this intention the present study articulates an analysis of Pascal's essays: Préface. Sur le Traité du vide, De l'esprit géometrique, De l'art de persuader, and some fragments from Pensées.
knowledge; geometric method; heart