Readers may be surprised to learn that Descartes begins
Meditations by asking for approval from theologians who were basically representatives of the Catholic Church. After all, he is famous for his belief that rationality is humankind’s best tool for understanding the world, an argument that helped spur the Enlightenment and significantly curb the church’s power in Europe. Yet he actually viewed rationality as a way to prove God’s existence with certainty and ultimately
reinforce religious faith. As he points out in this letter, atheists refuse to believe in God on faith, so rational arguments for God’s existence are the only way to win them over. Moreover, it was incredibly dangerous to challenge the church’s official beliefs in the 17th century—but this is exactly what Descartes’s work did. Even though he lived in the Netherlands, where the church’s power was very limited, he was seriously worried about ending up like Galileo (who was imprisoned for daring to argue that the Earth revolved around the Sun). But the Sorbonne’s approval would have protected Descartes from such a fate. Unfortunately, he never got it.