Abstract

The article focuses on Galileo's Letter to Castelli, 21 December 1613. The author analyzes Galileo's hermeneutical principles established in the first part of the letter and his literal interpretation of the passage from the Book of Joshua 10, 12-13, in Copernican terms, in the second part of the letter. Galileo appears to use the Bible as a scientific authority, supporting his Copernican views, and thus he seems to contradict his own hermeneutical principles. The author argues that Galileo's position is consistent, especially if one takes into account the historical context of its genesis, that is, in the context of the constant, theologically-inspired attacks on Copernicus and Galileo and his commitment to the heliocentric world system and in the context of his newly-made telescopic observations and discoveries.