Abstract
This article studies the issue of natural knowledge of God in the Bible verses which speak most explicitly about it: Romans 1,18-32. 'Natural knowledge' means here knowledge accessible to all men by virtue of their innate forces, possible even for those who have not partaken in the biblical revelalion. St. Paul's passage is compared with Wisdom 13-15, which shares many doctrinal points with it. The Pauline discourse, though inserted into a theological reasoning within the perspective of faith, represents a truly philosophical discussion for the social context in which it occurs. St. Paul presents his approach to God's reality with rational consistence, by emphasizing the central role of human freedom in this itinerary.