20 Some even maintain that these views do not conflict with what our predecessor laid down since - so they claim - he said that the sacred writers spoke in accordance with the external - and thus deceptive - appearance of things in nature. But the Pontiff's own words show that this is a rash and false deduction. For sound philosophy teaches that the senses can never be deceived as regards their own proper and immediate object. Therefore, from the merely external appearance of things - of which, of course, we have always to take account as Leo XIII, following in the footsteps of St. Augustine and St. Thomas, most wisely remarks - we can never conclude that there is any error in Sacred Scripture.
Source: Spiritus Paraclitus (Vatican.va)