The Holy Scripture and Nature equally proceed from the divine Word, the former as the dictation of the Holy Ghost and the latter as most observant executrix of God’s command.
G. Galilei, Letter to P. Benedetto Castelli, December, 21, 1613, in Opere, edited by A. Favaro (Firenze: Giunti-Barbera, 1968), vol. V, p. 282.