It is impossible for someone to dispel his fears about the most important matters if he doesn't know the nature of the universe but still gives some credence to myths. So without the study of nature there is no enjoyment of pure pleasure.
So it follows that those who have reason have freedom to will or not to will, although this freedom is not equal in all of them. [. . . ] human souls are more free when they persevere in the contemplation of the mind of God, less free when they descend to the corporeal, and even less free when they are entirely imprisoned in earthly flesh and blood.